Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/12 09:13:07
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nice! glad it's working for you too  Stray_Bullet
Pretty good stuff here brother! I have the FTW so some voltage settings are different. & I have VDroop control! =)
I ran mine @1800 FSB for 4.05 GHZ, 1.36v VCC 1.175 VTT & Auto GTLVREFS, couldn't boot...
Same voltages, your GTLVREFS & ran a quick 10 pass IBT. Passed like a champ! =)
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle
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VistaHead
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/12 09:27:59
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feniks
nice! glad it's working for you too
Stray_Bullet
Pretty good stuff here brother! I have the FTW so some voltage settings are different. & I have VDroop control! =)
I ran mine @1800 FSB for 4.05 GHZ, 1.36v VCC 1.175 VTT & Auto GTLVREFS, couldn't boot...
Same voltages, your GTLVREFS & ran a quick 10 pass IBT. Passed like a champ! =)
I knew folks would find this thread useful, whether they are using a Q9450 or not....
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/13 09:47:51
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just noticed that GTLVREF -40,-60,-60,-80 (for over 1800MHz) check out for both 1.20V (probably only 1866MHz) and 1.25V VTT which is even closer to ideal values, so should be more stable in upper speeds, e.g. 1900MHz or maybe even 2000Mhz if someone dares 
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JeffreyHam
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/13 11:22:19
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Thankx, Man.......the next time I get into experimental mode...I'll definately see if this will help me. I've not had much past success at 1866MHz but, I got 1867MHz working pretty good last winter. I need a better HSF if I want to run there daily tho.
 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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VistaHead
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/13 11:24:44
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JeffreyHam
Thankx, Man.......the next time I get into experimental mode...I'll definately see if this will help me. I've not had much past success at 1866MHz but, I got 1867MHz working pretty good last winter. I need a better HSF if I want to run there daily tho.
Go ahead and shoot for 2000Mhz.... 
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JeffreyHam
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/13 11:53:23
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I have tried that with both 9x and 8x. I can get my RAM to pass MemTest at 2000Mhz with 9-9-9-24 but, CPU needs well above 1.3625v and my HSF is extremely lacking above 4.2GHz.
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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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/13 12:19:59
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I wouldn't be surprised if most Q9450 (or any Q running 8x multi) on board without vdroop control, has to use around 1.50V and up vcore to gain so so stability at 500MHz FSB. I was able to enter Windows without crashing it only at/above 1.53V on vcore. CPU core power need grows exponentially above 1800MHz. last time I stabilized my (former) Q9450 at 2000MHz, it was fed with 1.57V in BIOS (vcore) and running 1.40V VTT ... and reaching 100C under IBT stress test LOL, so don't try to run it over there if you plan on keeping your chip for long My current Q9450 chip was able to get there too, though I haven't run any stability testing on it LOL. to be honest there is no such air cooling that would be sufficient at 50% overclock. even water cooling might be insufficient for "normally" considered safe temps. Probably TEC would do in terms of effective cooling at such OC.
post edited by feniks - 2011/06/13 12:22:46
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JeffreyHam
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/13 12:30:12
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I do not doubt that one bit! This was done with 1.40625v set in the BIOS and Vdrooped was 1.360v.  That's when I said, "Boy.....you are gonna fry your chip if you push it any further"!!
post edited by JeffreyHam - 2011/06/13 12:32:26
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VistaHead
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/13 12:31:31
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I am tempted to try, especially since I am running at 3.8Ghz using 1.25v, and that is only because I am too lazy to attempt lowering the voltage more.
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/15 13:10:41
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feniks long time since i readed one of your posts here on the forums, since the old forum wipe most of the information about the 790i was lost forever, but bringing this back still gives us the 790i owners some fun stuff to do with our motherboards. This guide will be useful once i get some free time, so i will resume my testings on my 790i to try to get a 24/7 OC with 4x2GB memories, i have been fighting to get stabe at @1600 without luck, currently im sitting @1333 pretty stable but i know that there is a sweet spot somewhere where i can get 3.6Ghz stable, you can see all the tests that i have done so far here http://forums.evga.com/tm.aspx?m=1014809
EVGA 790i SLI Ultra 132-CK-NF79 (BIOS P08) | Intel Q9450 /w Thermalright Ultima-90 /w 2x Scythe S-FLEX 120mm Fan 8GB Patriot PGS34G1600ELK | EVGA 560 Ti OC'ed 1000/2000/2290 | Cooler Master Cosmos-S | Corsair HX1000 PSU
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/15 13:34:59
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Thank you  Left some notes in your thread. your setup should easily do 1800MHz with memory at 8-8-8-22 2T @ 1.7V (or 1.8V if needed). Loosen memory timings if you hard lock, e.g. use 9-9-9-27 and re-tes. Initially use 1.30V on FSB (you can try GTLVREF later), keep SPP at 1.45-1.50V (or even 1.55V if running SLI), MCP leave on auto, you just need to find a stable vcore for CPU, mine calls for 1.437V in 790 Ultra BIOS (used to run it on 1.37-1.39V 2.5 years ago). EDIT: I hope you also claimed your prize from P67 sweep stakes, seems you hit the P67 FTW board on top of that superclock cooler from other sweepstakes hehe, lucky man http://www.evga.com/articles/00635/
post edited by feniks - 2011/06/15 13:46:13
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/15 14:57:09
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feniks
Thank you
Left some notes in your thread. your setup should easily do 1800MHz with memory at 8-8-8-22 2T @ 1.7V (or 1.8V if needed). Loosen memory timings if you hard lock, e.g. use 9-9-9-27 and re-tes.
Initially use 1.30V on FSB (you can try GTLVREF later), keep SPP at 1.45-1.50V (or even 1.55V if running SLI), MCP leave on auto, you just need to find a stable vcore for CPU, mine calls for 1.437V in 790 Ultra BIOS (used to run it on 1.37-1.39V 2.5 years ago).
Thanks for your tips with the help of JeffreyHam and VistaHead i have advanced a lot on it, once i have free time to work on it i will do the tests and report back (the 790i is currently my desktop pc at work, so i cant easily turn it off and mess with it) feniks
EDIT:
I hope you also claimed your prize from P67 sweep stakes, seems you hit the P67 FTW board on top of that superclock cooler from other sweepstakes hehe, lucky man
http://www.evga.com/articles/00635/
Hahahaha really lucky indeed, i have claimed both prizes and the cooler just arrived, the p67 is still on the way, i will build a new pc at home with it. 
EVGA 790i SLI Ultra 132-CK-NF79 (BIOS P08) | Intel Q9450 /w Thermalright Ultima-90 /w 2x Scythe S-FLEX 120mm Fan 8GB Patriot PGS34G1600ELK | EVGA 560 Ti OC'ed 1000/2000/2290 | Cooler Master Cosmos-S | Corsair HX1000 PSU
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2011/06/15 15:57:35
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sounds good, good luck man! 
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2012/03/12 07:27:53
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Hmm going to have to switch out some ram and go for the sync'd 1800 FSB and give this a shot when the new cooler comes today. Thanks for the post.. I love this board.
One (1) MOOD (Monetarily Opressed Overclock Disorder) Affiliate Code: NJ6-4UH-S5FY
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2012/03/12 08:03:40
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My Q9450 has a sweet spot at 1800mhz allowing for 1.15v on fsb voltage with right GTLVREF, normally it would be 1.25v. Any higher than this and around a massive FSB hole 1868-1932 and it calls for 1.35 or 1.40.
If settings from calculator do not work at once, try playing around with them a bit, I'm sure you will find the working ones. Good luck!
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle
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Marctraider
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2012/03/25 11:40:03
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Hello, a bit of an old thread but never the less I'd wanted to say that I'm also trying to overclock my Q9450, and yeah its pretty hard to get past 475Mhz with this thing. I'm now trying to tune my GTL ref's and its going good so far, takes a while but I've almost managed to get the thing stable at 490MHz :) (Using 1.35v VTT to work with) My CPU mostly likes GTLRef Multipliers of around 0.600-0.625x on both Dies apparently. When 490 is stable I will try my bet on 500!
post edited by Marctraider - 2012/03/25 11:43:08
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2012/03/25 12:34:16
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^ nice! yeah, without GTLVREF tuning some chips won't go past 475MHz or will call for extreme 1.40-1.45V on the FSB/VTT (a killer in a long run, I degraded one chip by using 1.45V on FSB) with proper GTLVREF 1.35V should be all you need. however for firmer stability when 3Dmark benches are not going through you may need still the 1.40V despite the GTLVREF tuning.
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Marctraider
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2012/03/25 14:23:05
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Yup you're right. I have my VTT on 1.35v now and I'm pretty confident all of my 4 GTL's have been properly tuned, or at least to the best of my ability :) (Have been working on this for a week, lol) Unfortunately it still hangs at 1.35v so consistently with Prime95 at around test 6/7. i'll either have to increase it or lower it. Ive currently increased it to 1.37v and guess what, it hangs at test 1 now, almost instantly. Oh well, in the worst case I'll have to accept a 480 perhaps 485mhz FSB. The weird thing is though, the freezes wont happen when I tune down my NB GTL a bit but then errors are back in Prime95 :S
post edited by Marctraider - 2012/03/25 14:41:48
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2012/03/25 15:25:46
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I wouldn't bother stress testing it at such CPU overclock. I used those speeds for 3dMark benching only, if it passed it was good enough for me.
for daily use I was running an awesome 1.15v FSB voltage (with GTLVREF tuning) at 1800MHz/450Mhz equaling 3.6Ghz on Q9450, my vcore was around 1.44v as set in BIOS with 790 Ultra vdroop, around 1.38-1.39v actual in Windows.
I underclocked my 2x4GB memory sticks instead (same rated voltage, below rated speed, tighter/lower timings instead).
glad it's working for you, keep an eye on CPU temps and don't stress test it to much at extreme clocks.
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Marctraider
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2012/03/25 15:33:21
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Yeh, well I can get 1.25v VTT stable with 475FSB and 3.8Ghz clock with 1.235v IntelBurnTest and 24 prime stable so thats ok, I just want to push as far as possible with still some decent voltages :)
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2012/03/25 15:59:22
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Marctraider
Yeh, well I can get 1.25v VTT stable with 475FSB and 3.8Ghz clock with 1.235v IntelBurnTest and 24 prime stable so thats ok, I just want to push as far as possible with still some decent voltages :)
awesome vcore! sweet chip you are having over there man mine was much more power hungry and still I had one before which was even worse than that (degraded it eventually hehe, amazon exchange helped to get a replacement). happy tuning and good luck!
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle
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Twinturbo
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2012/03/30 14:47:38
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Would this apply to the 780i? not the FTW.
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Re:GTLVREF calculation (done right I hope) worked for my 790 Ultra + Q9450 first the time
2012/03/30 15:54:11
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Twinturbo
Would this apply to the 780i? not the FTW.
not sure, but I doubt it. 780 didn't have the negative adjustments on GTL.
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." - Aristotle
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