crusnik
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, July 19, 2011 6:42 AM
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I have some Patriot Viper Xtreme running memtest+ v4.20 right now at the specs in my sig. Gottem for $115 from newegg. So far q9650 @ 4.05GHz with 1800MHz FSB linked n synched has run error free for 48 min. I'm sure I still have some tweakin to do to get it that way for several hours but it's far better than what I was getting and I haven't even begun to tweak so I expect to be able to tighten up the timings once I confirm it's error free for several hours. I've already found some changes in this thread that I probably need to make to get it stable so I expect to get errors but I'll wait and see how long it goes.
I have some concerns about memtest though. I see a lot of people swear by it and yet others just use various Prime 95 tests and say if it passes those then your OC is good. I've passed the various recommended Prime 95 tests on an OC only to have memtest fail sometimes w/o passing or fail on the 2nd or 3rd pass. It seems like all the windows tests will pass with flying colors yet memtest will end up having an error.
It just makes me wonder if my setup needs to pass every fricken test everyone uses for stability on their overclock!? If it passes prime 95 and IBT I don't seem to have any problems running my apps and games, so I just wonder how much I should worry about rare memtest errors. Maybe it's something most software can overcome by catching erroneous data.
Thoughts?
Cooler Master CM Stacker 830 nVidia Edition (6 x 120mm fans) | COOLER MASTER Real Power Pro1000 RS-A00-EMBA 1000W eVGA nForce 790i SLI FTW DIGITAL PWM | q9650 @ 4.05GHz 1800MHz FSB | Thermalright Ultra-120 Extreme Patriot Viper Xtreme 8GB (2 x 4GB) PC3-16000 (2000MHz) PX538G2000ELK (1800MHz 9-11-9-27 2T @ 1.65V) 1 - EVGA GeForce GTX 580 3072MB (stock for now) Creative Sound Blaster X-Fi Platinum Fatal1ty Champion | PLEXTOR 18X DVD±R Super Multi DVD Burner Win7 x64 Professional | 300GB VelociRaptor WD3000HLFS | 2 x Seagate Barracuda 7200.12 ST31000528AS 1TB (RAID 1) 2 x Western Digital Caviar Blue WD3200AAKS 320GB 7200 RPM (RAID 1)
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JeffreyHam
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, July 19, 2011 7:34 AM
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I never waste time testing with Prime....takes too long. I ALWAYS MemTest my RAM at whatever speed and timings I am trying to run first. Once it passes error-free then, I test the CPU with IBT...20 passes at Max Stress level. Pass that and am good to go. 
 PLEASE REMEMBER TO UPLOAD A COPY OF YOUR INVOICE  = My Current Linked and Synced Settings All detailed system components are listed on my Mods Rigs page.
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n9zn-extra
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, July 19, 2011 7:59 AM
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JeffreyHam
I never waste time testing with Prime....takes too long. I ALWAYS MemTest my RAM at whatever speed and timings I am trying to run first. Once it passes error-free then, I test the CPU with IBT...20 passes at Max Stress level. Pass that and am good to go.
I agree with this Jeff. Not due to the numerous OC's I have done (NOT) but for the few I have done the combination of those two test have not let me down. Nor have they not let many others down I have read about.
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xarot
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, July 19, 2011 11:39 AM
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Hi Guys! I just grabbed a second-hand EVGA 790i Ultra A1 just for the fun and going to do a project about it. Just because I wanted it previously and the price was right (60 euros only). Yet to do some more testing that it really works. I have 2-3 BFG GTX 285s around my house (I actually have FOUR of them) :D. Also going to look for a QX series CPU for it (or Q9650). Currently running it with E7500. But, for the question. I used two sticks of 2 GB Corsair 1600 Dominators (CL8) from my X58 setup. Primed overnight at 1600 FSB linked & synced at 1.65V (2T). However I'd like to grab some new RAM for it. I'd really like the looks of this kit since this is a project anyway: http://www.gskill.com/products.php?index=338 Any idea if these Snipers should work? I actually was surprised my Dominators seemed to work fine with the board. :) Previously I've had regular Kingston 1333 CL9 4GB kit with my another 790i (Asus Striker II Extreme) and worked fine. Also G.Skill has some sticks that someone reported fully working with the board. Patriot sticks everyone is suggesting is nowhere available in Finland I think. EDIT: uhh, Medicine Man has exactly this kit. Looking forward to hear how they will run. :)
post edited by xarot - Tuesday, July 19, 2011 11:47 AM
Core i9 7980XE, Rockit Cool nickel IHS on water Asus Rampage VI Extreme 64GB Corsair Dominator Platinum 3200 PALIT RTX2080TI on EK block Custom Water Cooling with 360+480 radiators + D5 pump Phanteks Enthoo Primo Corsair AX1500i Intel 750 1.2 TB PCIe Samsung 960 PRO 1 TB Win 10
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labatts
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Re:Using 4GB RAM modules on a 790i series board
Monday, August 01, 2011 11:22 PM
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Tried and succeeded at getting 8 gigs of g.skill ripjawsx (f3-12800cl9d-8gbxl) working on my 790i digital,managed to get them at 1700mhz linked and synced in the black slots.But when i tried another set for 16 gig i got a long beep didn't even make it to post and had to turn off my power supply to stop the cycle of beeps.. Tried to up the spp voltage to the max red setting but that didn't help,same thing happened..take out the 2 in the blue slots and it works perfectly,put them back in and my board vomits beeps.Guess there just might be a limit to how much these boards can take using the Evga bios,or my digital doesn't like 16 gig..Still pretty happy to get 8 gig working so nicely. Guess now i have a spare 8 gig in case my memory goes tits up,it was cheap so i'm not to choked about it.  This is with the dz19 bios.
post edited by labatts - Monday, August 01, 2011 11:26 PM
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root_1
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Re:Using 4GB RAM modules on a 790i series board
Wednesday, August 03, 2011 7:54 AM
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Hello !
Have somebody tried running 16 Gb on FTW Digial PWM ? What was the result ? Thanx.
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Re:Using 4GB RAM modules on a 790i series board
Wednesday, August 03, 2011 11:58 AM
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labatts
Tried and succeeded at getting 8 gigs of g.skill ripjawsx (f3-12800cl9d-8gbxl) working on my 790i digital,managed to get them at 1700mhz linked and synced in the black slots.But when i tried another set for 16 gig i got a long beep didn't even make it to post and had to turn off my power supply to stop the cycle of beeps..
Tried to up the spp voltage to the max red setting but that didn't help,same thing happened..take out the 2 in the blue slots and it works perfectly,put them back in and my board vomits beeps.Guess there just might be a limit to how much these boards can take using the Evga bios,or my digital doesn't like 16 gig..Still pretty happy to get 8 gig working so nicely.
Guess now i have a spare 8 gig in case my memory goes tits up,it was cheap so i'm not to choked about it.
This is with the dz19 bios.
i was wondering, could it be that somehow lowering 1700MHz to 1600 or below in the bios would allow you to boot with your 16GB?
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labatts
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Re:Using 4GB RAM modules on a 790i series board
Wednesday, August 03, 2011 2:13 PM
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I tried that,even unlinked my memory and cpu in hopes that it would boot,but had no luck..
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crusnik
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Re:Using 4GB RAM modules on a 790i series board
Thursday, August 04, 2011 0:07 PM
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Had to take a long break from testing due to personal reasons, but I have the beast up and memtesting again and it has gone past the 4 hour mark with no errors. See my setup in my sig. I'm pleasantly surprised at the OC I was able to get. I had to drop $115 on better memory, but I built this rig 3 years ago and been running at stock until some gaming and encoding made me wonder if I could get an "upgrade" with a good OC.
Looks like a got a new 4.05GHz quad core, 4 -> 8 GB RAM, and 1800MHz FSB. I think I'll ride that OC until the next Intel 2011 socket comes out. My temps are looking good. Thought about getting a closed liquid cooling kit, but I'm only running about 65C using IBT on air. Now if I can just wait until the eVGA 580 3gb drops a little more in price, I could really use a better video card, but I'm going to see wait kinda OC I can get outta this 280.
Glad I checked the forums. I find the best stuff on eVGA forums for squeezing every penny outta the systems.
Thanks for all the testing and sharing.
Cooler Master CM Stacker 830 nVidia Edition (6 x 120mm fans) | COOLER MASTER Real Power Pro1000 RS-A00-EMBA 1000W eVGA nForce 790i SLI FTW DIGITAL PWM | q9650 @ 4.05GHz 1800MHz FSB | Thermalright Ultra-120 Extreme Patriot Viper Xtreme 8GB (2 x 4GB) PC3-16000 (2000MHz) PX538G2000ELK (1800MHz 9-11-9-27 2T @ 1.65V) 1 - EVGA GeForce GTX 580 3072MB (stock for now) Creative Sound Blaster X-Fi Platinum Fatal1ty Champion | PLEXTOR 18X DVD±R Super Multi DVD Burner Win7 x64 Professional | 300GB VelociRaptor WD3000HLFS | 2 x Seagate Barracuda 7200.12 ST31000528AS 1TB (RAID 1) 2 x Western Digital Caviar Blue WD3200AAKS 320GB 7200 RPM (RAID 1)
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n9zn-extra
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Re:Using 4GB RAM modules on a 790i series board
Thursday, August 04, 2011 0:47 PM
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crusnik
Thought about getting a closed liquid cooling kit, but I'm only running about 65C using IBT on air.
Glad I checked the forums. I find the best stuff on eVGA forums for squeezing every penny outta the systems.
Thanks for all the testing and sharing.
Two things here, I have a 790i Ultra SLI mother board I am dying to overclock, the guys here are great with helping, and this motherboard has a lot of life left in her. No need for me to upgrade the system just yet, I may be able to get another 2 years out of it, depending on what software comes out in the market. As of now it keeps up with everything just fine. You mentioned getting a closed loop, I recently purchased every thing for water including blocks for the NB/SB, vregs, and CPU for the 790i used. I was amazed to discover these same blocks are still available new, I never found them when I was looking. If you do decide to go to water you can certainly find the parts, look for Bits Power water blocks. Those are the brand I have except for the CPU and there are many brands of those available. I can hardly wait to get onto water. Should you want the vendors web site for Bits Power PM me and I will happily pass it along. I feel pretty sure there is more than one vendor with stock but I have not looked.
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Re:Using 4GB RAM modules on a 790i series board
Thursday, August 04, 2011 5:25 AM
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labatts
I tried that,even unlinked my memory and cpu in hopes that it would boot,but had no luck..
You may have tried this already, but taking memory out of the black slots altogether and trying a boot with 2x4GB in the blue slots? If it works then you know that your memory works in the blue slots (end of experiment). ...BUT, if it doesn't work then you have the option of trying to get it working in the blue...and IF you ever do, then THAT opens up the option of trying again with all four slots loaded with your 16GB. (just a thought)
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zildjian75
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Re:Using 4GB RAM modules on a 790i series board
Saturday, August 20, 2011 4:48 PM
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just a heads up... I'm not fully tested but....
I upgraded my EVGA 790 Ultra SLI to the same 2x4GB Corsairs that tt0ne recommended...
I am currently running my Q9650 at 3.83 ghz with the RAM linked and synced at 1700....
I have been quite busy lately so I haven't had time to fully test...I successfully ran IBT for 10 passes at max memory usage... This was 4 days ago, and the system has been folding 100% ever since... CPU and 2 GTX 465's...
I'm not totally confident that it is 100% stable since I haven't done the proper testing... But I am becoming more confident in the stability with each day that passes... Not even a hiccup at this point. Only the proper testing will tell.... But so far so good!!!
Now that Im sitting here all proud, I'll probably go home to find the darn thing smoking!!! Me and my big mouth!!! When will I learn.....
"The wise know their weakness too well to assume infallibility; and he who knows most, knows best how little he knows." Thomas Jefferson RIG#1 (Home) - i7 4790k @ 4.4ghz w/ CM V8 GTS - EVGA Z97 Classified - Win10 64bit - Corsair Dominator Platinum 16GB (2x8GB) @ 2133mhz - 2 x EVGA GTX 980SC in SLI - Corsair AX850 - 250GB Samsung Evo (main) - 500GB Samsung Evo (games) - 1TB WD Black (misc) - Aerocool Strike-X (Cheesy... But effective!)
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ripsteakface3000
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Re:Using 4GB RAM modules on a 790i series board
Wednesday, August 24, 2011 2:39 AM
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Hi all, total newb here, but I need to upgrade my ram and found this thread. So I want to go to 2x4GB and maybe more later if it will take it. Running a 790i FTW with an E8400 all stock settings (3GHz). Basically just want a stable system but maybe some mild OC ability at some time. Based on everyone's testing, does it appear the following would work well? Very good deal at Fry's right now. Sorry I can't put the link yet.
Patriot PXD38G1866ELK Viper Xtreme Performance Desktop Memory Kit - 8GB (2 x 4GB) PC3-15000, DDR3-1866MHz, 9-11-9-27 CAS Latency
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tt0ne
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Re:Using 4GB RAM modules on a 790i series board
Monday, September 12, 2011 10:56 AM
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Hey y'all!
I just read this thread after being away for quite a while and was amazed at all the progression people had made with different memory sticks from different vendors, overclocks, and the awesome sense of community!
Right now I'm playing Deus Ex 2 using the same setup earlier in the thread and I'm blown away at how much life I've gotten out of this mobo and processor. I can honestly say that this motherboard has surpassed my last favorite mobo - the DFI LanParty NF4 SLI-D (you know the one which allowed you pump up to 5 volts through your memory - LOL!)
Anyways, just wanted to say hi!
- tt0ne
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zildjian75
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Re:Using 4GB RAM modules on a 790i series board
Monday, September 12, 2011 2:32 PM
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Hey tt... Welcome back... Just wanted to send a quick thank you... I was getting ready to build a new z68 rig until I came across your thread in a last ditch attempt to see if I could get 8 gigs stable at about 3.8 ghz on a 790i... I saw what you said about the carsairs, and decided to give it a shot... It worked flawlessly.. In fact, I am now at the exact same settings as I was with 4 gigs of RAM... Thank you for extending the life of my rig!!!! All it was lacking was more RAM... The old quads still have plenty of horsepower!!! No need to upgrade just yet. 
"The wise know their weakness too well to assume infallibility; and he who knows most, knows best how little he knows." Thomas Jefferson RIG#1 (Home) - i7 4790k @ 4.4ghz w/ CM V8 GTS - EVGA Z97 Classified - Win10 64bit - Corsair Dominator Platinum 16GB (2x8GB) @ 2133mhz - 2 x EVGA GTX 980SC in SLI - Corsair AX850 - 250GB Samsung Evo (main) - 500GB Samsung Evo (games) - 1TB WD Black (misc) - Aerocool Strike-X (Cheesy... But effective!)
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tt0ne
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, September 13, 2011 10:28 AM
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Yep, agreed, man - this is the first time I've ever had a rig and didn't feel compelled to upgrade to the latest next-gen processor. It's actually a nice feeling - I get to enjoy my machine instead of compulsively watching newegg ;-)
tt0ne
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key_to_zion
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, October 18, 2011 7:48 PM
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Hello all, I have been looking over this thread for a moth or two now trying to decide if it made sense for me to upgrade RAM, and which kit would be the best if I did upgrade. As of right now I have only 4 gigs of OCZ Platinum DDR3 1600 Model: ( I have another set of the same RAM that I was running before, which gave me 8 gigs, but recently (and after some PC trouble) it was giving me some errors that made me remove one set in order to regain stability. I could possibly get them all up and running again, but I have not had the time to fully trouble shoot the whole thing. My main question is: If i do upgrade from the OCZ Platinum sticks, what would I need to get to receive a performance increase, or at least stay at a comparable level of performance? The OCZ Platinum sticks run at: 1600mhz CAS Latency of (7) 7-7-7-24 Timings With a voltage of 1.7v What would I need in order to equal that in performance? I am running my CPU - Intel Core 2 Quad Q9550 Yorkfield 2.83GHz - at stock clocks and in unlinked mode with my RAM currently. I have been looking at several sets - all of which are 2x8 gigs: G.SKILL Ripjaws X Series 8GB - Which runs at 1600mhz, has a CAS Latency of (9), and has the timings: 9-9-9-24. < Or the: G.SKILL Sniper Series 8GB - Which runs at 1866mhz, has a CAS Latency of (9), and has the timings: 9-10-9-28. < I have the nForce 790i SLI FTW mobo, which supports 8 gigs at 2000mhz. There are a few other kits around that have love timings and 2000mhz clocks, but those are a little expensive for me and I probably wouldn't fully utilize their potential. Should I upgrade? Do I need to overclock to even see any benefits? Which kit should I get if I upgrade? Are my old RAM sticks going to give me on par performance with the newer ones? I look forward to any responses.
post edited by key_to_zion - Tuesday, October 18, 2011 7:52 PM
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key_to_zion
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, October 18, 2011 7:56 PM
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I see that I am not allowed to post links to the particular products, so I will post to Newegg Item numbers:
OCZ Platinum 4GB: N82E16820227297
G.SKILL Sniper Series 8GB: N82E16820231460
G.SKILL Ripjaws X Series 8GB: N82E16820231428
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JeffreyHam
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, October 18, 2011 8:22 PM
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I would shoot for an 1800MHz (Linked and Synced) OC before purchasing new RAM. If you are not constantly receiving Low Memory messages from Windows...there is no need for you to run 8GB's or more.....MHO.
PLEASE REMEMBER TO UPLOAD A COPY OF YOUR INVOICE = My Current Linked and Synced Settings All detailed system components are listed on my Mods Rigs page.
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key_to_zion
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, October 18, 2011 8:54 PM
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Thank you for the response.
So, I should shoot for an overclock with my current RAM.
If I was to buy a new set, do you think it would be more prudent to buy the 1866mhz Sniper kit, or would it not really give me much gain over the 1600mhz Ripjaw kit?
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JeffreyHam
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, October 18, 2011 8:58 PM
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I would try OC'ing your current RAM......which, will save you money. It really doesn't make much sense nowadays to dump money into tech that is well past it's life cycle.
PLEASE REMEMBER TO UPLOAD A COPY OF YOUR INVOICE = My Current Linked and Synced Settings All detailed system components are listed on my Mods Rigs page.
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key_to_zion
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, October 18, 2011 9:08 PM
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True. The only reason I am even considering are the very low prices on the dual channel kits on newegg, which are practically dirt cheap.
Also, being a student, where money is fairly tight, I want to try and squeeze the most out of my current system for the least amount of money. Overclocking would be the best option to do that though... Considering it's free :P
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JeffreyHam
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Re:Using 4GB RAM modules on a 790i series board
Tuesday, October 18, 2011 10:07 PM
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I hear ya. The thing is though......the RAM that you are interested in buying is low-voltage and is designed to be run on the newer boards of today. The 790i was designed to run higher voltage (1.8v - 2.0v) modules. Even though many folks...as shown in this thread, are having success running them......there are also many that cannot get them to work at all. In buying them, you would have at best, a 50/50 chance of them working properly for you. You should also be aware that; like I previously said regarding low memory messages from Windows......if you are not experiencing that issue.....adding more RAM is not going to increase your system performance at all. If you need help OC'ing your system, please start a new thread here in this Forum and we will do our best to assist you. We cannot "hijack" this thread by working on your system on it. Thankx.
PLEASE REMEMBER TO UPLOAD A COPY OF YOUR INVOICE = My Current Linked and Synced Settings All detailed system components are listed on my Mods Rigs page.
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johnr_7@msn.com
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Re:Using 4GB RAM modules on a 790i series board
Friday, December 02, 2011 6:13 PM
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I have recently installed a pair of Corsair CMX8GX3M2B1600C9 4GB memory sticks on my 790i Ultra SLI rig. So far I've been unable to get 4 4GB sticks to work (check out ), but 2 4GB sticks work fine. I'm running them at 1600MHz, 1.5V in either slots 0-1 or 2-3 (both work). Got 16GB from Newegg for $87, thought I'd try it. Have run IntelBurnTest v2.52 numerous times, no problems... looks like I lucked out.
Initially got 2 sticks to run @ 1333MHz, stock RAM timing and voltage; then bumped it to 1600MHz.
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n9zn-extra
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Re:Using 4GB RAM modules on a 790i series board
Saturday, December 03, 2011 1:24 AM
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johnr_7@msn.com
I have recently installed a pair of Corsair CMX8GX3M2B1600C9 4GB memory sticks on my 790i Ultra SLI rig. So far I've been unable to get 4 4GB sticks to work (check out ), but 2 4GB sticks work fine. I'm running them at 1600MHz, 1.5V in either slots 0-1 or 2-3 (both work). Got 16GB from Newegg for $87, thought I'd try it. Have run IntelBurnTest v2.52 numerous times, no problems... looks like I lucked out.
Initially got 2 sticks to run @ 1333MHz, stock RAM timing and voltage; then bumped it to 1600MHz.
THE VOLTAGE IS TOO LOW! The 790i mobos require between 1.8 to 2.0 volt memory, it sounds like you have done what many others have done, purchased memory intended for an Intel X?? low voltage memory platform. Without knowing the specs on your memory my initial guess is that it will not work well in your system. The first thing I would tell you to do is return it and get memory designed to run on the 790i while you can. I know several people who have purchased low voltage memory that passed memtest but caused all kinds of various problems, some of those folks even purchased new motherboards and PSUs trying to solve the problems. Eventually they changed the memory to something closer to what the 790i requires and the trouble went away. If you start seeing strange things happening replace the memory first, I would nearly guarantee it is the culprit. Memory is speced at a certain voltage, if the manufacturer adhered to the standards for memory you should be able to over volt it by no more than 0.2 volts. Anything over that amount may destroy the memory. Since you have your memory running at 1.5 volts I am wondering if it can be overvolted enough to make it work without damaging the memory, getting your 1.5 volt memory to 1.8 volts is an increase of 0.3 volts and outside memory standards.. I have only read your post that I am replying to, but there should be many post in this forum suggesting memory that will work well in a 790i platform. Patriot is one of the leading brands but it is getting hard to find. Sorry to deliver the bad news but it is what it is.
post edited by n9zn-extra - Saturday, December 03, 2011 1:38 AM
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johnr_7@msn.com
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Re:Using 4GB RAM modules on a 790i series board
Sunday, December 04, 2011 1:23 PM
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n9zn-extra
johnr_7@msn.com
I have recently installed a pair of Corsair CMX8GX3M2B1600C9 4GB memory sticks on my 790i Ultra SLI rig. So far I've been unable to get 4 4GB sticks to work (check out ), but 2 4GB sticks work fine. I'm running them at 1600MHz, 1.5V in either slots 0-1 or 2-3 (both work). Got 16GB from Newegg for $87, thought I'd try it. Have run IntelBurnTest v2.52 numerous times, no problems... looks like I lucked out.
Initially got 2 sticks to run @ 1333MHz, stock RAM timing and voltage; then bumped it to 1600MHz.
THE VOLTAGE IS TOO LOW!
The 790i mobos require between 1.8 to 2.0 volt memory, it sounds like you have done what many others have done, purchased memory intended for an Intel X?? low voltage memory platform. Without knowing the specs on your memory my initial guess is that it will not work well in your system. The first thing I would tell you to do is return it and get memory designed to run on the 790i while you can. I know several people who have purchased low voltage memory that passed memtest but caused all kinds of various problems, some of those folks even purchased new motherboards and PSUs trying to solve the problems. Eventually they changed the memory to something closer to what the 790i requires and the trouble went away. If you start seeing strange things happening replace the memory first, I would nearly guarantee it is the culprit.
Memory is speced at a certain voltage, if the manufacturer adhered to the standards for memory you should be able to over volt it by no more than 0.2 volts. Anything over that amount may destroy the memory. Since you have your memory running at 1.5 volts I am wondering if it can be overvolted enough to make it work without damaging the memory, getting your 1.5 volt memory to 1.8 volts is an increase of 0.3 volts and outside memory standards..
I have only read your post that I am replying to, but there should be many post in this forum suggesting memory that will work well in a 790i platform. Patriot is one of the leading brands but it is getting hard to find.
Sorry to deliver the bad news but it is what it is.
Thanks for the folllowup. The only problem I've had so far was when i tried to save my system config to an Nvidia profile, and then loaded that profile on system startup, my system would lock right after loading the Windows 7 64 desktop. I dropped the Nvidia profle, used evga Precision Tool to control the video card fan (instead of Nvidia profle), and everything's OK again. I also tested both 4GB pairs, and both worked identically. If I have a problem, will try bumping the memory voltage a little. I will also post again (with a complete BIOS config) if this ram in fact does run stably for an extended period. Only been running this ram for 4 days.
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n9zn-extra
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Re:Using 4GB RAM modules on a 790i series board
Monday, December 05, 2011 9:35 AM
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johnr_7@msn.com
n9zn-extra
johnr_7@msn.com
I have recently installed a pair of Corsair CMX8GX3M2B1600C9 4GB memory sticks on my 790i Ultra SLI rig. So far I've been unable to get 4 4GB sticks to work (check out ), but 2 4GB sticks work fine. I'm running them at 1600MHz, 1.5V in either slots 0-1 or 2-3 (both work). Got 16GB from Newegg for $87, thought I'd try it. Have run IntelBurnTest v2.52 numerous times, no problems... looks like I lucked out.
Initially got 2 sticks to run @ 1333MHz, stock RAM timing and voltage; then bumped it to 1600MHz.
THE VOLTAGE IS TOO LOW!
The 790i mobos require between 1.8 to 2.0 volt memory, it sounds like you have done what many others have done, purchased memory intended for an Intel X?? low voltage memory platform. Without knowing the specs on your memory my initial guess is that it will not work well in your system. The first thing I would tell you to do is return it and get memory designed to run on the 790i while you can. I know several people who have purchased low voltage memory that passed memtest but caused all kinds of various problems, some of those folks even purchased new motherboards and PSUs trying to solve the problems. Eventually they changed the memory to something closer to what the 790i requires and the trouble went away. If you start seeing strange things happening replace the memory first, I would nearly guarantee it is the culprit.
Memory is speced at a certain voltage, if the manufacturer adhered to the standards for memory you should be able to over volt it by no more than 0.2 volts. Anything over that amount may destroy the memory. Since you have your memory running at 1.5 volts I am wondering if it can be overvolted enough to make it work without damaging the memory, getting your 1.5 volt memory to 1.8 volts is an increase of 0.3 volts and outside memory standards..
I have only read your post that I am replying to, but there should be many post in this forum suggesting memory that will work well in a 790i platform. Patriot is one of the leading brands but it is getting hard to find.
Sorry to deliver the bad news but it is what it is.
Thanks for the folllowup. The only problem I've had so far was when i tried to save my system config to an Nvidia profile, and then loaded that profile on system startup, my system would lock right after loading the Windows 7 64 desktop. I dropped the Nvidia profle, used evga Precision Tool to control the video card fan (instead of Nvidia profle), and everything's OK again. I also tested both 4GB pairs, and both worked identically.
If I have a problem, will try bumping the memory voltage a little. I will also post again (with a complete BIOS config) if this ram in fact does run stably for an extended period. Only been running this ram for 4 days.
Before you bump the memory up to +0.2 volts please check with the manufacturer. I have no way of knowing if they adhered to the memory design standards. I hope this works for you, seeing anyone run into trouble is never fun or desired.
post edited by n9zn-extra - Monday, December 05, 2011 9:37 AM
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johnr_7@msn.com
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Re:Using 4GB RAM modules on a 790i series board
Monday, December 05, 2011 11:43 PM
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My system has been very stable for days with 2x4GB ram modules @ 1.5V, so I thought I'd post my BIOS config:
BIOS Conguration – EVGA 790i Ultra SLI MB with 2x4GB Corsair CMX8GX3M2B1600C9 ram modules * (see note below)
CPU Q9550 Core 2 Quad
OS Windows 7 Ultimate 64 Bit SP1
RAM CORSAIR XMS3 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
Desktop Memory Model CMX8GX3M2B1600C9
MOTHERBOARD
Mfg EVGA
Model 132-CK-NF79 790i Ultra SLI
Version 2
North Bridge Revision B1
South Bridge Revision A3
Firmware Phoenix P10
SYSTEM CLOCKS
CPU Freq, MHz 3400
FSB Reference Clock, MHz 1600
CPU Multiplier 8 (8.5)
CPU N/2 Ratio Enabled
PCIE x16_1 & x16_2, MHz Auto
PCIE x16_3, MHz Auto
SPP < -- > MCP Ref Clock, MHz Auto
** HT Multiplier **
nForce SPP à nForce MPP 5
nForce SPP ß nForce MPP 5
** Spread Spectrum Settings **
CPU Spread Spectrum Disabled
PCIE Spread Spectrum (SPP) Disabled
PCIE Spread Spectrum (MCP) Disabled
SATA Spread Spectrum Disabled
FSB AND MEMORY CONFIG
FSB Memory Clock Linked
FSB Memory Ratio Sync Mode
P1,P2 Auto
** Memory Timing Settings ** Expert
tCL, tRCD, tRD, tRAS, CMD 9,9,9,24,2T
Adv Memory Settings All Auto
CPU Configuration
Limit CPU MaxVal Disabled
Intel SpeedStep Disabled
CPU Thermal Control Disabled
CIE Enhanced Halt State Disabled
Execute Disable Bit Disabled
Virtualization Technology Disabled
CPU Core 1,2,3,4 Enabled
HPET Function Enabled
System Voltages
CPU Core Auto
CPU FSB Auto
Memory 1.5V (rated voltage)
nForce SPP Auto
nForce MCP Auto
GTLVref 0,1,2,3 Auto
* These ram modules are actually designed for core I5 and I7 Mobos; however, they work OK on my 790i Ultra SLI, and they’re $$$ CHEAP $$$ now.
I've run multiple tests (Intel Burn Test (maximum), SISoftware Sandra Burn-In, Prime95, MemTest86, and a bunch of my own tests over the last week that tend to freeze my system with an unstable config. It's been rock-solid. Since they ram is so cheap now, thought I'd let you all know.
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johnr_7@msn.com
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Re:Using 4GB RAM modules on a 790i series board
Wednesday, December 07, 2011 4:09 PM
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Some people are under the impression that the 790i Board requires ram rated at 1.8V or higher. Thought I'd better investigate further. I found the following on Corsair's website for ram compatible with the 790i: Link below on 2 lines because site blocks url refs ww2.corsair. com/configurator/product_results.aspx?id=522300 Some of the compatible ram voltages are down to 1.5V. I have also been running OCZ ram for years @ 1.7V, no problem.
post edited by johnr_7@msn.com - Wednesday, December 07, 2011 5:41 PM
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n9zn-extra
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Re:Using 4GB RAM modules on a 790i series board
Wednesday, December 07, 2011 8:12 PM
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johnr_7@msn.com
Some people are under the impression that the 790i Board requires ram rated at 1.8V or higher. Thought I'd better investigate further. I found the following on Corsair's website for ram compatible with the 790i:
Link below on 2 lines because site blocks url refs
ww2.corsair.
com/configurator/product_results.aspx?id=522300
Some of the compatible ram voltages are down to 1.5V. I have also been running OCZ ram for years @ 1.7V, no problem.
I am really glad you ask about this and yes you are partially correct abnout 1.7 volt memory working ok, Do not take what you see as as assurance all memory will work at 1.7 volts under all conditions. Your link did not work, it had some spaces, I tried a couple of things with no success. Without going off to dig up a lot of information on this I can tell you that the 790i has been known to run lower voltage memory and this is especially true when the memory is running at one of the motherboards slower memory speeds, like 1333MHz for example, and with only half of the memory slots occupied. I successfully ran 4GB in two memory slots at 1333MHz with two memory slots unoccupied, it was Patriot 1.7 volt rated memory, on my 790i for a couple of years with no known memory related issues. Now I am running 2000MHz 1.8 to 1.9 volt rated memory in 4 slots at a higher voltage because I know the motherboard will need to step the voltage up even with this memory running at 1333MHz. When I overclock this motherboard, CPU and memory I will have to step the voltage up again to even higher voltages than where it is presently set to insure correct operation. I know others have run into issues trying to run memory at lower voltages including 1.7 volts when the memory is set to run at speeds above 1333MHz, this is true for memory rated at 1333MHz and for memory rated at 2000MHz. I do not recall where I found the voltage requirements for the 790I memory but if I recall correctly it actually stated 1.8 to 2.1 volts as the real range. The 790i is designed to run memory at higher voltages than the Intel newer X## motherboards. One thing you must take into consideration is the fact that chip sets, CPUs, and memory will work differently when compared to other like devices. That is the reason for matched memory kits, some CPUs overclocking to higher clocks than others of like kind, and some chip sets tolerating things others of like kind will not. The recommendation for memory voltage does not mean anything outside the recommendations will not work, it means everything should work if it is rated within the recommendations. Hence the recommendation of 1.8 to 2.0 volt memory (I have not seen any memory rated at 2.1 volts for the 790I, although 2.1 volts is within the 790i motherboard's recommended voltage range, and is why I personally tell people the recommended memory voltage is 1.8 to 2.0 volts. Out of curiosity here are 3 questions I would like you to answer for us. What is your memory size in GB? What are the memory speed, and voltage ratings? How many memory sticks do you have installed and how many memory banks are left open? Once we get the answers to these questions it should help explain why you are successful running memory at 1.7 volts. Also by that time others who have posted re: 1.8 to 2.0 volt recommendations may have additional insight to add. If you had any concerns about memory standards and being able to overvolt memory +0.2 volts, I found those standards online, they came from JEDEC but I do not remember if I read them on the JEDEC site or another site.
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