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Max Base Clock Strategy Guide

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MJinZ
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Re:Max Base Clock Strategy Guide 2010/01/21 14:29:51 (permalink)
linux... noticed a typo on the first page ... the 2:6 multiplier should be 215 *12 (you have it as 215 *16)

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Re:Max Base Clock Strategy Guide 2010/01/22 11:54:51 (permalink)
MJinZ

linux... noticed a typo on the first page ... the 2:6 multiplier should be 215 *12 (you have it as 215 *16)



Do you mean for the Uncore frequency? If so, the minimum the x58 boards will allow is 16x even if you set 2:6 for the memory.

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Re:Max Base Clock Strategy Guide 2010/01/22 13:51:43 (permalink)
Hi everyone,

Linux this has been a great guide first of all, been following for almost a week now while OC'ing my new rig.

But running into some walls now and was hoping for some feedback. First of all my rig consists of a E762, I7 975, 12Gb of 2000 Corsair Dominator GT ram (stock speeds are 8,8,8,24 1T @1.65v), EVGA 285 (2gb) ver., and OCZ Z series Gold z1000m (1000w). I am cooling the 975 with a TRUE in push/pull format using 2 delta's at 150cfm each. My OS is Win 7 Ultimate x64

Now I haven't overclocked a system since the days of old XP athalon chips so this has been a total learning curve
I followed your guide through to figure out the bclck which stopped for me at 220 x 15 the increase's to bclck where all done with the eleet tool inside Win, with vcore at 1.325, VTT at 225 and(the rest of your settings). I then reduced the bclck to a bit more stable level of 215 x 15, and all volts still the same from the inside the Bios, and upped the Mem multi to 2:8 and uncore x16 and Had troubles with posting. I found this odd that from inside Win using the eleet tool the computer would run a higher bclck but when set manually inside the bios there was posting issues, was wondering if perhaps you or any other readers had run into this problem?

 So now I was wondering if perhaps because I have a 975 I could use a higher CPU multi such as the stock x25 multi, and reduce the bclck to say 160 to reach the 4+ ghz mark. I had done a lot of working numbers and found that at a 158 x 26 multi (actual speed from eleet is 4097.6mhz @ 157.6 x26), Mem freq at 2:12 (actual speed from eleet is 1891.4mhz), Uncore @ 24x, with these volts:

vcore: 1.3375
IOH/ICH I/O Voltage: 1.5
ICH vcore: 1.15
QPI PLL vcore: 1.275
IOH PLL vcore: 1.8
CPU PLL vcore: 1.8
IOH vcore: 1.225
CPU VTT: +225mV (1.425v)
Dram vcore: 1.65

It runs great under LinX and Prime. Memtest pass's as well. So now i'm wondering how can i pursue say 4.3Ghz, what would be the next best option for me in terms of bclck, vcore, as well as maintaining stable Mem freq. Any input will be great and if you need any kind of screengrabs I can post them right away. Just a side thought this Rig is being used for High end 3D rendering and am looking for a pretty stable 24/7 solution also reason why for the 12 GB of ram heh. Thanks in advance for any help and I hope to hear back soon. ^_^  Thx

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Re:Max Base Clock Strategy Guide 2010/01/22 15:27:09 (permalink)
I think with the 975 that you would be better off sticking with a lower bclk and using a higher CPU multiplier. For example, you could start with bclk 133 and then work up your memory multiplier to 2:14, which gives you 1866 MHz memory frequency. If that is stable, you can then increase the CPU multiplier a notch at a time and work on overclocking the CPU.

The other thing to keep in mind is that with 12GB of memory, there will be more strain on the memory controller. It may not be possible to get the memory stable at 2000 MHz but you can try and get there. Also, you may have to set the command rate to 2T if you run into memory issues.

A while back I helped someone get their 975 stable at around 4.45 GHz. He was using a bclk of 135. Here is the link for that:

http://www.evga.com/forum..hive/tm.asp?m=100953658


There may be something in there that can help you out.

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Re:Max Base Clock Strategy Guide 2010/01/25 11:03:47 (permalink)
Hi again Linuxrouter,

Thanks so much for the great link you shared for the 975 that you helped SuperV8 with. Reading through this has helped my overclocking situation greatly. In fact i have almost reached a completely stable 4.4ghz through this information. (4377.9 exact read) I have been tuning down Vcore and VTT alot to while still holding a this overclock but have just hit a wall which i think is only curable by extreme H2O instead of Air.

I do my bclck tests with LinX for 10 runs and 3gb of Ram out of the full 12 for speed purpose's heh. But when I use these current settings on a LinX test with 6gb of ram i get the usual 0x124 or 0x101 blsod errors. When I increase vcore 1 step again with blsod and then I have increased VTT 1 step and still the same combination of blsod's but before we get blsod's my temps tap the 84/85 limit which is basically where I stop. When using Prime95 on blend though i can run it for more then 8 hours without errors as well as Memtest all seems ok in those 2 dept's.

But i was wondering 1 thing about Prime's blend test as I always have my task manager up to see the amount of Ram or CPU usage being used and I notice when running LinX at 3Gb of Ram its pulling about 4.3Gb (1.5gb added for accounting the extra processes running of cource) but when i'm using Prime95 I'm only seeing about 2.5gb of ram being taxed. I tried multiple different settings inside of Prime and wasn't able to get it to use any more ram then this. Have you any suggestions on this as I want to make sure that I get the best test possible.  LinX is a program I have never used before this as Prime95 and its predecessor have been my main stress test tool. So just wondering your opinion on the 2 as LinX seems to stress the system pretty hard.

Being all that said I have a screen shot or two that you can take a look at to see where all my volts and multipliers are at. The first one is where it was safe for 3gb Ram Linx runs and handeled them no problem.


By hermanthesmasher at 2010-01-25

The second image is where i'm at now as I get blsod's from Linx 6gb Ram runs probably caused by not enough vcore or vtt but because of temps i'm not sure where to go ATM.


By hermanthesmasher at 2010-01-25

I checked all my eleet volt settings against the ones in bios and are correct. My uncore is 28 multi, and RAM is 2:14 (1866mhz) Also I was noticing that my Vdimm is set to 1.65 but in bios PC Health it fluctuates between 1.68 and 1.7v, Does that make sense? Any opinions or advice is greatly appreciated and I'm so glad to see this has been added as a part of the sticky's list from rjohnson.
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Re:Max Base Clock Strategy Guide 2010/01/25 12:50:04 (permalink)
Hi, just noticed the images are vice versa per the comments. Sorry bout that ^_^
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Re:Max Base Clock Strategy Guide 2010/01/25 12:52:19 (permalink)
Great stuff linux, well BR deserved my friend.

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MJinZ
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Re:Max Base Clock Strategy Guide 2010/01/25 12:54:58 (permalink)
linuxrouter

MJinZ

linux... noticed a typo on the first page ... the 2:6 multiplier should be 215 *12 (you have it as 215 *16)



Do you mean for the Uncore frequency? If so, the minimum the x58 boards will allow is 16x even if you set 2:6 for the memory.


Hmm never noticed it limited to 16x.

* Edit, my BIOS lies.
post edited by MJinZ - 2010/01/25 17:44:17

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Re:Max Base Clock Strategy Guide 2010/01/26 14:02:58 (permalink)
HERMANtheSMASHER

Hi again Linuxrouter,

Thanks so much for the great link you shared for the 975 that you helped SuperV8 with. Reading through this has helped my overclocking situation greatly. In fact i have almost reached a completely stable 4.4ghz through this information. (4377.9 exact read) I have been tuning down Vcore and VTT alot to while still holding a this overclock but have just hit a wall which i think is only curable by extreme H2O instead of Air.

I do my bclck tests with LinX for 10 runs and 3gb of Ram out of the full 12 for speed purpose's heh. But when I use these current settings on a LinX test with 6gb of ram i get the usual 0x124 or 0x101 blsod errors. When I increase vcore 1 step again with blsod and then I have increased VTT 1 step and still the same combination of blsod's but before we get blsod's my temps tap the 84/85 limit which is basically where I stop. When using Prime95 on blend though i can run it for more then 8 hours without errors as well as Memtest all seems ok in those 2 dept's.

But i was wondering 1 thing about Prime's blend test as I always have my task manager up to see the amount of Ram or CPU usage being used and I notice when running LinX at 3Gb of Ram its pulling about 4.3Gb (1.5gb added for accounting the extra processes running of cource) but when i'm using Prime95 I'm only seeing about 2.5gb of ram being taxed. I tried multiple different settings inside of Prime and wasn't able to get it to use any more ram then this. Have you any suggestions on this as I want to make sure that I get the best test possible.  LinX is a program I have never used before this as Prime95 and its predecessor have been my main stress test tool. So just wondering your opinion on the 2 as LinX seems to stress the system pretty hard.

Being all that said I have a screen shot or two that you can take a look at to see where all my volts and multipliers are at. The first one is where it was safe for 3gb Ram Linx runs and handeled them no problem.

The second image is where i'm at now as I get blsod's from Linx 6gb Ram runs probably caused by not enough vcore or vtt but because of temps i'm not sure where to go ATM.

I checked all my eleet volt settings against the ones in bios and are correct. My uncore is 28 multi, and RAM is 2:14 (1866mhz) Also I was noticing that my Vdimm is set to 1.65 but in bios PC Health it fluctuates between 1.68 and 1.7v, Does that make sense? Any opinions or advice is greatly appreciated and I'm so glad to see this has been added as a part of the sticky's list from rjohnson.



Hello,

Glad to hear the link helped. :)

The 0x124 can be either VTT or VCore. However, 0x101 is generally related to VCore. Since you got both codes, I would look at the VCore first. What you also might want to do is temporarily lower the CPU multiplier and leave everything else as is. Then retest stability. If you still get a 0x124, then you may have to increase VTT further. Also, with your core temps peaking at 85C, you may want to back down the bclk one or two notches. This may help stabilize your system. If you decide to go over to water, I think you will have more room to OC. The cooler temps may make it possible to lower the VCore a bit.

Regarding Prime95, you would want to select the Custom option and the enter a memory size in the text box that says Memory to Use. The default is 1600MB. I think both LinX and Prime95 are good stressing testing programs and I usually run both.

One other thing I wanted to mention is that if you go back to 6 sticks of memory, this can cause your temps to go up some and as a result you may have to increase the voltages again for stability.


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Re:Max Base Clock Strategy Guide 2010/01/26 14:04:22 (permalink)
Governator

Great stuff linux, well BR deserved my friend.



Thanks. :)

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Re:Max Base Clock Strategy Guide 2010/01/28 08:17:44 (permalink)
Very good guide , but here is my problem :)

I have reached to 206 blck and when I set it to 209 in BIOS I cant boot to windows nor to bios - I have to reset CMOS via the button
All settings are the same like in your guide . My temperatures running Linx are 68 degrees.

Can you tell me what to increase/change . Thank you in advance 




P.S. My problem is very strange . Now I tried to set the starting values 15x multiplier and 160 blck and again I can`t boot :(
(I have saved profile @ 3.8 Ghz I can boot with it though . It is done using some template.)
post edited by statis - 2010/01/28 09:20:33


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Re:Max Base Clock Strategy Guide 2010/01/28 11:38:14 (permalink)
statis

Very good guide , but here is my problem :)

I have reached to 206 blck and when I set it to 209 in BIOS I cant boot to windows nor to bios - I have to reset CMOS via the button
All settings are the same like in your guide . My temperatures running Linx are 68 degrees.

Can you tell me what to increase/change . Thank you in advance 

P.S. My problem is very strange . Now I tried to set the starting values 15x multiplier and 160 blck and again I can`t boot :(
(I have saved profile @ 3.8 Ghz I can boot with it though . It is done using some template.)



When the system fails to boot, what does the POST LED code say on the board?

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Re:Max Base Clock Strategy Guide 2010/01/28 22:01:59 (permalink)
Hi, I got to 4ghz stable (20x192).
I'm having some problems with ram memory (2000mhz 8-8-8-24)
I get 1553mhz in 2:8, there is no way my system can handle 2:10 with 20x uncore.
Is there any method to calculate how much I need to tight my latency to get my 2000mhz back ? I'm trying 6-6-6-17.
How far should I go ?
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Re:Max Base Clock Strategy Guide 2010/01/28 22:21:57 (permalink)
veggav

Hi, I got to 4ghz stable (20x192).
I'm having some problems with ram memory (2000mhz 8-8-8-24)
I get 1553mhz in 2:8, there is no way my system can handle 2:10 with 20x uncore.
Is there any method to calculate how much I need to tight my latency to get my 2000mhz back ? I'm trying 6-6-6-17.
How far should I go ?



You will have to loosen the timings some if you want to try for 2000 MHz memory frequency. I would try the stock timings of 8-8-8-24 first. If and when you have that stable, you can try for tighter timings. Otherwise, you can stick with your current memory frequency and CL6 timings. I have a Dominator GT 2000MHz kit and have the memory set at 1600 MHz 6-7-6-18. I have gone as tight as 6-6-5-17 with it. 

Just make sure to run Memtest86+ as you tighten the timings to make sure there are not any errors.


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Re:Max Base Clock Strategy Guide 2010/01/28 23:26:19 (permalink)
Here is an interesting article about memory and speed:
http://www.anandtech.com/.mory/showdoc.aspx?i=3589
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Re:Max Base Clock Strategy Guide 2010/01/29 06:09:57 (permalink)
Mine is the same kit 2000mhz.
The problem is the uncore, to support 2:10 the uncore must be 20x and that's too much, I'm already with 250+ of VTT.
This is my bios settings for 4ghz stable:

memory frequency:
2:8
target memory 1538mhz
6 - 6 - 6 - 16 - 50 - 1t

voltage control:
with vdroop
cpu vcore 1.32500v
cpu vtt voltage +250mv
cpu ppl vcore [auto]
ioh ppl vcore [auto]
qpi ppl vcore 1.275v
DIMM Voltage 1.610v (because the motherboard set +0.4v on it and my memory justl ike yours use 1.65v)
DIMM DQ Vref [auto]
IOH Vcore [auto]
IOH/ICH I/O Voltage [auto]
ICH Vcore [auto]
VTT PWM Frequency [250 khz]
CPU PWM Frequency [800 khz]
CPU Impedance [auto]
QPI Signal compensation [auto]

cpu features:
speedstep disable
turbo enable
cxe disable
execute disable bit enable
virtualization technology disable

intel ht enable
active processors core all

qpi control settings enable
qpi link fast mode enable
qpi frequency selection [auto]

cpu clock ratio 20x (21x because of turbo)
cpu host frequency 192

cpu uncore frequency 3269mhz (17x) -> 8x2=16+1

I'm getting max temps of 75 on linx. I think this is the far I can get for a 24/7 system.
I belive if I raise for 4.2ghz or 4.4ghz this will give me an extra 10 degreas and 85-90 degrees celcius is just too much.

Benchmarking my ram I'm getting 43.5ns (on everest) for latency and this is not as much as it can give.
In normal operation it can give 39~40 ns, copy of 22000mb/s so for this cpu overclock i'm loosing my memory speed.
The problem is my system would need too much voltage to accept 2:10 and 20x uncore multiplier and this does not seems right for a long life 24/7 system.
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statis
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Re:Max Base Clock Strategy Guide 2010/01/29 11:56:00 (permalink)
Linuxrouter I get these LED codes E8 , 02, b9, 00 and they repeat all over again in this order


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Re:Max Base Clock Strategy Guide 2010/01/29 12:13:56 (permalink)
statis

Linuxrouter I get these LED codes E8 , 02, b9, 00 and they repeat all over again in this order



I have not seen those codes before and they are not listed in the manual.


Try the original settings in the guide but with these changes:


Memory frequency: 2:8
VTT: +150mv for the Classified or +250mv for the E758

Normally if there is a memory issue you would see code 68 or C1 on the LED. However, I have one system that does not like the 2:6 memory multiplier which is why I suggest trying 2:8. VTT is the voltage for the Uncore and QPI and those frequencies go up as bclk goes up.

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Re:Max Base Clock Strategy Guide 2010/01/29 15:12:10 (permalink)
It worked only with changing multiplier . I have corsair dominator GT 1600 mhz and timings were automatically loosened to 11-11-11-28 because my memory is at 1640 Mhz . As I understand I will have to work on this later..
I have a question about degrees. Which program should I use? Currently I am monitoring through E-leet and Core temp and E-leet shows 2 degrees less than coretemp :) 

Last question for now :) When I increase bclk should I do it through E-leet or through BIOS
post edited by statis - 2010/01/29 15:17:00


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Re:Max Base Clock Strategy Guide 2010/01/29 15:31:37 (permalink)
statis

It worked only with changing multiplier . I have corsair dominator GT 1600 mhz and timings were automatically loosened to 11-11-11-28 because my memory is at 1640 Mhz . As I understand I will have to work on this later..
I have a question about degrees. Which program should I use? Currently I am monitoring through E-leet and Core temp and E-leet shows 2 degrees less than coretemp :) 

Last question for now :) When I increase bclk should I do it through E-leet or through BIOS



I would leave the timings as is for now and work on the bclk first. You can always tighten timings later on.

I use Realtemp to monitor core temps.

E-Leet should be fine for adjusting bclk. This method is much less of a hassle then having to reboot each time and change something in BIOS. Once you reach your desired bclk and that bclk is stable, you can store those settings in BIOS.


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statis
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Re:Max Base Clock Strategy Guide 2010/01/29 16:25:19 (permalink)
Ok I reached 210 bclk and I got a freeze during Linx on the first run. I inceased VTT by +25 mV untill 
+175 mV and I still get freezes. 
What should I do.. Increase it more ..but to what amount ?

My board is evga E760
post edited by statis - 2010/01/29 16:28:53


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Re:Max Base Clock Strategy Guide 2010/01/29 22:47:28 (permalink)
statis

Ok I reached 210 bclk and I got a freeze during Linx on the first run. I inceased VTT by +25 mV untill 
+175 mV and I still get freezes. 
What should I do.. Increase it more ..but to what amount ?

My board is evga E760



What is the CPU multiplier at currently?

A couple things to try:

QPI PLL ( 1.25v )
QPI Signal Compensation ( Less )

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Re:Max Base Clock Strategy Guide 2010/01/30 03:08:12 (permalink)
Multiplier is at 15x
I tried both and again I got freezes during first run :(

I tried also incresing PCI freq to 105 and VTT to +175mV .. still the same
post edited by statis - 2010/01/30 03:11:03


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Re:Max Base Clock Strategy Guide 2010/01/30 13:05:03 (permalink)
statis

Multiplier is at 15x
I tried both and again I got freezes during first run :(

I tried also incresing PCI freq to 105 and VTT to +175mV .. still the same



The other possibilities are VCore or something memory related. I would be surprised if it was the VCore as your core frequency is only 3150 MHz. However, you can try and add +25-50mv there first.

If that fails, try setting the memory timings manually to 8-8-8-24-74-1T and make sure XMP is disabled.

It could also be that you have reached the upper bclk limit of your chip. Not all chips make it to the higher bclk.

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statis
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Re:Max Base Clock Strategy Guide 2010/01/30 15:21:31 (permalink)
Ok I nailed the chip at 21x190... I am satisfied at this vcore is 1.375 temps dont go beyond 63 degrees. Can you help me make my memory faster .. I think I lose too much 80 Hz. Maybe I should try to incrase bclk by 1 


EDIT: on the last run of Linx i got error . What should I do? :(
post edited by statis - 2010/01/30 15:31:07


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Re:Max Base Clock Strategy Guide 2010/01/30 18:23:26 (permalink)
statis

Ok I nailed the chip at 21x190... I am satisfied at this vcore is 1.375 temps dont go beyond 63 degrees. Can you help me make my memory faster .. I think I lose too much 80 Hz. Maybe I should try to incrase bclk by 1 


I just did a check for the Dominator GT 1600 MHz kit, and it looks like it is rated for 7-7-7-20 timings. If that is the kit you have, you can set the timings to 7-7-7-20-74-1T to start with. If that works, you can try for CL6.

statis 
EDIT: on the last run of Linx i got error . What should I do? :(


Add two notches to VCore.

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statis
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Re:Max Base Clock Strategy Guide 2010/01/31 05:36:37 (permalink)
CL7 works :) Should I test CL6 using memtest?
What is the safe temp for Vreg?


EDIT: I noticed strange thing in Far cry 2 with my new overclock . At some points frames drop by 10. In my previous overclock i had steady 60fps framerate. Could be it that QPI link is 300 Mhz more in my previous clock ? I think I can increase multiplier to 18x to the new clock hopefully without stability issues. What is your opinion ? 
post edited by statis - 2010/01/31 11:00:08


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Re:Max Base Clock Strategy Guide 2010/01/31 15:13:28 (permalink)
statis

CL7 works :) Should I test CL6 using memtest?
What is the safe temp for Vreg?
 


You can try that. I run 6-7-6-18-74-1T timings with my Dominator GT kit. I prefer to keep the VReg temp below 70C.


statis 
EDIT: I noticed strange thing in Far cry 2 with my new overclock . At some points frames drop by 10. In my previous overclock i had steady 60fps framerate. Could be it that QPI link is 300 Mhz more in my previous clock ? I think I can increase multiplier to 18x to the new clock hopefully without stability issues. What is your opinion ? 



Try and add bit more voltage to the IOH and see if that helps.

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statis
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Re:Max Base Clock Strategy Guide 2010/02/01 16:26:15 (permalink)
I am completely lost what to do now :) I am at 191 x21 =4011 Ghz , Uncore= 191x18=3418 
Vcore 1,375  Vtt +175 
IOH 1.3  QPI PLL 1.3

Memory at 6-7-6-18
I am getting Linx erros
otherwise temps are Ok 





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Re:Max Base Clock Strategy Guide 2010/02/01 17:20:24 (permalink)
Statis,

It appears that you are going in two different directions at the same time.  Are you trying to get stable or get better performance from the system? 

If you are unstable, or borderline unstable, you should be changing one thing at a time seeking  to regain rock-solid stability.  Once you achieve stability, then you can tweak one setting at a time to optimize your settings with the knowledge that any failure will be the result of that one change. 

It can be a long and teadious process but making multiple changes gives you no information on why the sytem becomes unstable.  If you are unstable you should not be tightening the memory timing or raising the BCLK, raising the Uncore or reducing any voltage.  It is true that, in rare cases, too much VDIMM can cause the memory to be unstable, but that is usually only over their rated max volts. 

Be methodical and you will eventually find the setting that makes the system happy and you can resume your quest for 5ghz.

Good luck

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