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i860 P7P55D-E Pro OC Thread - Page 2

post #11 of 22
Thread Starter 
Update:

Gaming with the 4ghz setup isn't working out as the game is crashing. Highest temp received was 63.5C.

I'm gonna wait for some input from you all before i proceed any further. Until then I am dropping it back down to 3.8ghz setup.

Another update: 6:18pm.

System isn't stable at 3.8ghz when running BF3 and Dxtory (ingame recorder - but i wasn't recording yet).
The game runs fine without that program started though - but none the less the system isn't stable.

FACK!

Update: 6:40pm....

I narrowed down the problem to my crossfire setup. If i play with one video card everything is fine. If i play with both crossfired the game crashes.

So i guess the system is stable with the settings, just have to fix the video card settings for more voltage i guess.

Now i have to research on how to fix that.
Edited by metz467 - 2/21/12 at 3:41pm
post #12 of 22
Why would you need such high voltage for IMC and RAM?My 860 ES only runs with 1.28v IMC and 1.6v RAM at 4GHz (200x20).
RAM voltage must not exceed the .5v threshold from IMC voltage.But it doesn't mean that you have to run it at exactly .5v higher.

Also CPU Spread Spectrum should be disabled.
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post #13 of 22
Thread Starter 
Quote:
Originally Posted by Silent Knight View Post

Why would you need such high voltage for IMC and RAM?My 860 ES only runs with 1.28v IMC and 1.6v RAM at 4GHz (200x20).
RAM voltage must not exceed the .5v threshold from IMC voltage.But it doesn't mean that you have to run it at exactly .5v higher.
Also CPU Spread Spectrum should be disabled.


Well my system was unstable, i raised the numbers according to the article..
post #14 of 22
Quote:
Originally Posted by metz467 View Post

Okay here are my findings but i want to first start of by saying i have never done this before and have no clue about any thing....but now that i am finished, i have a basic understanding of how to OC a computer using the below article.
I began reading a dif. article to OC my PC and it made a lot of sense (it also was using my MB.
New Article
So anyway, my first step was to find out my max bclck number (i followed the instructions exactly from the above article- so read that article as i am leaving a lot of information out to keep this short).
My Bclck number and settings under stable conditions was as follows:
  • Bclck: 200
  • IMC Voltage: 1.375
  • Dram Voltage: 1.875 (exactly .5 higher then IMC)

To achieve these results, took some time and effort as there was a lot of manipulation of the voltage, bclck, and stability tests - 6 hours worth at least.
So now that i have my Bclck number, it is now time to play with the multiplier. I started off at 150 as the article stated and progressively went up until faced with stability issues, which then i would then increase my vcore voltage.
What i learned (most of you probably know this) is the more voltage, the higher temps you get, so it is crucial to follow the article instructions to a 'T' so you get the most efficient Voltage use with your multiplier.
Following system specs:
3.8ghz setting
  • Multiplier 20
  • Bclck 190
  • Vcore:1.27
  • IMC: 1.375
  • Dram: 1.875
  • P95 @10m 65C
  • INTEL BURN TEST @5m CPU TEMP 70C
As for the following options:
  • Speedstep
  • C1E
  • Hyperthreading
  • CPU Spread Spectrum
  • C-State
I had them all ENABLED aside from C-State.
All of the stability tests passed so i thought all was good. I went in to play some BF3 and the game would crash after a few minutes - i think this was caused to powersaving settings. So i went back in and turned off all the above options, the game then ran just fine.
4.0ghz setting
  • Multiplier 20
  • Bclck 200
  • Vcore:1.345
  • IMC: 1.375
  • Dram: 1.875
  • P95 @10m 70C
  • INTEL BURN TEST @5m CPU TEMP 82C
So in conclusion, I am running the 4ghz setup right now and everything is fine as expected but i do know it is not completely stable in terms of CPU heat. So i am just running the computer and keeping an eye on the heat. I am just using t his computer as a gaming computer so i dont expect to be stressing the system as much as Intel Burn Test or P95 - my logic is, if the computer holds up with these settings for a week with no issues or heat problems, its stable for me.
I would love to get 4.2ghz out of this but i will find that out in a week with how my temps do as 4.2 was way too hot too quick when i tried it out.

VCORE is fine, IMC and DRAM voltages are very high, I currently run my 870 at IMC 1.15 @ 167BCLK DRAM 1.65@2000MHZ (Corsair XMS3 2000MHz) Vcore 1.344 @ 4.0 GHz (24x)
 
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post #15 of 22
Thread Starter 
Quote:
Originally Posted by oglommi View Post

VCORE is fine, IMC and DRAM voltages are very high, I currently run my 870 at IMC 1.15 @ 167BCLK DRAM 1.65@2000MHZ (Corsair XMS3 2000MHz) Vcore 1.344 @ 4.0 GHz (24x)

If i had a bclck of 167, my voltage would be lower but since i am running it at 200, it needs more....but i could be wrong.

Anyone know why my system crashes to the desktop when playing in crossfire mode but when i only play with one video card all is fine?
post #16 of 22
Im downloading 3Dmark to check out how my 4GHz compares to other to see if lower BLCK hurts performance.

Graphics card OC? I can run 1 560ti at over 1GHz but when in SLI 990 is absolute max.


3Dmark results

http://3dmark.com/3dm11/2821602

8882. Physics part is about 8900 @4GHz. wich seems as good as it gets after checking other 870 results. Best Physics I could find for 870 was 9400 @ 4.4 GHz

Conclusion lower BLCK does not hurt CPU performance
Edited by oglommi - 2/22/12 at 11:21pm
 
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post #17 of 22
Quote:
Originally Posted by metz467 View Post

If i had a bclck of 167, my voltage would be lower but since i am running it at 200, it needs more....but i could be wrong.
Anyone know why my system crashes to the desktop when playing in crossfire mode but when i only play with one video card all is fine?
IMC of 1.3-1.35v wouldn't help?As i stated before,i ran 200x20 with only 1.2875v IMC and it was fully stable.
If it's not the case then you just got a bad CPU.

The crashing could be caused by driver conflicts,have you installed the CAP for specific games?

Did you disable CPU and PCIe Spread Spectrum and lock PCIe Frequency at 101-102MHz?
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post #18 of 22
Thread Starter 
sorry for my absence - ran into SSD problems when the system booted up and had to fix that which took a few days to find out the problem.

Since that problem i went to an aftermarket Corsair H100 water cooler.

I did a full comparison to my aftermarket heat sync and during normal running conditions its 20C lower and while under intel burn test load its 10C lower.

I am gonig to play with the OC again and see what i can manage...I'll keep you all updated.
post #19 of 22
Please share your results, I'm very eager to see them wink.gif

I wish to achieve 4.0 Ghz but I keep running into BSOD 124. So I scaled back to 3.8 GHz with a 1.3875 Vcore and 1.3875 IMC and still I get those BSODs from time to time... I hope you don't run into the same problem as I did.
post #20 of 22
Thread Starter 
okay everyone - its done.

I am running a water cooled setup (h100 corsair) which i highly recommend as its dropped my temps huge and i would not of been able to achieve these results.

Here are my findings:


4Ghz
Multilpyer: 20
Bclck: 200
Vcore: 1.375
IMC: 1.375
Dram: 1.5

If this doesn't work and you are crashing, up your vcore by .025 and try again. Do not exceed your limits.

Thank you everyone for your help smile.gif

I will update the first post in this thread.
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