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Can't get my i7 920 to be stable @ 4GHz

post #1 of 33
Thread Starter 
CPU Vcore: 1.33125
CPU: PLL: 1.860 (idk why tbh, do I need this?)
QPI PLL: 1.140 (same question as above)
Dram: 1.640

My ram frequency is 1080MHz (SPD is 6).

Any tips? What am I doing wrong lol?
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post #2 of 33
Your monitor is bottle necking your CPU.

LOL Jk..
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post #3 of 33
PLL to 1.88 and try a possible bump of QPI
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post #4 of 33
Quote:
Originally Posted by Z Overlord View Post
My ram frequency is 1080MHz (SPD is 6).
Do you mean that you have it set at 1080mhz? Or is that the bios setting equaling out to 2160mhz?

If so I would wager that that is the problem. If not keep slowly increasing volts till it stables out.
    
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post #5 of 33
Quote:
Originally Posted by Z Overlord View Post
CPU Vcore: 1.33125
CPU: PLL: 1.860 (idk why tbh, do I need this?)
QPI PLL: 1.140 (same question as above)
Dram: 1.640

My ram frequency is 1080MHz (SPD is 6).

Any tips? What am I doing wrong lol?
A D0 stepping 920 needs 1.33v to be stable at 4.0GHz? I don't think so.

I believe you forgot to adjust your QPI/VTT Voltage. There is a difference between QPI/VTT Voltage and QPI PLL. Try raising your QPI/VTT Voltage to maybe 1.3. Don't listen to the above poster that says you should raise PLL. Lower the CPU PLL to 1.7, this shouldn't be any higher than 1.8.

Try that.
Edited by Airolden - 1/17/11 at 7:59pm
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post #6 of 33
Thread Starter 
erBall: It's set to 1080. The SPD is the multiplier (set to 6).

Airolden: Ok, will do. but what about QPI PLL? Set it to default?
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post #7 of 33
Quote:
Originally Posted by Z Overlord View Post
erBall: It's set to 1080. The SPD is the multiplier (set to 6).

Airolden: Ok, will do. but what about QPI PLL? Set it to default?
It is fine where it is at. You could raise it to 1.2 if you want, it may help stability though I doubt it.
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post #8 of 33
Thread Starter 
Ok so I did what you said in post #5 and I BSoD before the desktop loads.

So what now lol? QPI PLL at 1.2 lol?

BTW I set cpu pll to auto because it defaults to 1.8
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post #9 of 33
Quote:
Originally Posted by Z Overlord View Post
Ok so I did what you said in post #5 and I BSoD before the desktop loads.

So what now lol? QPI PLL at 1.2 lol?

BTW I set cpu pll to auto because it defaults to 1.8
Hmm... then you must have a voltage or setting that is off...

Try loading optimized defaults
setting BCLK to whatever you need for 4GHz
raising the VCore to 1.325 - 1.35
setting LLC to level 2
raising QPI Voltage to 1.35
raising QPI PLL to 1.2
raising DRAM voltage to 1.66v
set CPU Clock Skew to 300ps

Also, be sure that your QPI Clock Ratio is x36, your Uncore Clock Ratio is 2x (or possibly 2x + 1) your memory multiplier, Performance Enhance is set to Extreme (Under memory settings) and that all power saving features + turbo mode are off.

I know that is a lot but I would be very surprised if that didn't make you stable. Hope this helps, I will be back tomorrow to check in.
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post #10 of 33
Thread Starter 
Setting llc to level 2 is not in my bios, only on or off.
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