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Who has a i7920 D0/P6T w/Stable 4.2ghz(200x21) OC?

post #1 of 13
Thread Starter 
Well lets see under the hood please? Please share what voltages and settings you are using, my goal is to get to a stable 200x21 myself. Which as you can see in detail here, I have been unable to do.

My most recent unstable OC settings
BCLK=200
CPU Volt=1.3
QPI Volt=1.35
I have all my settings, temps, and voltages listed here, Could you please take a look at them for me please and tell my what to try to get to BCLK 200 stable based on what you see?
Still getting BSOD after a few minutes of prim95 small fft.
Edited by )v(aster - 12/1/09 at 12:31am
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post #2 of 13
Quote:
Originally Posted by )v(aster View Post
Well lets see under the hood please? Please share what voltages and settings you are using, my goal is to get to a stable 200x21 myself. Which as you can see in detail here, I have been unable to do.

My most recent unstable OC settings
BCLK=200
CPU Volt=1.3
QPI Volt=1.35
Everything else the same as in detail here
Still getting BSOD after a few minutes of prim95 small fft.
From looking at that, you'll definitely need more vcore and probably more QPI. For my 4.3GHz, I need 1.5V. Try giving it 1.5V for vcore and if it's stable, work your way down from there.
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post #3 of 13
Yikes. Dont give it 1.5V unless you 100% keeping a CLOSE eye on your temps.
Mine only needed 1.28V for 1.3 w/ HT, but it's a different batch on a different board so I'm not sure how relevant that is.
post #4 of 13
Thread Starter 
Good to see some feedback, thank you, Ill look ito those tomorrow. Anymore people out there care to share?
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post #5 of 13
Quote:
Originally Posted by Deagle50ae View Post
Yikes. Dont give it 1.5V unless you 100% keeping a CLOSE eye on your temps.
Mine only needed 1.28V for 1.3 w/ HT, but it's a different batch on a different board so I'm not sure how relevant that is.
lol. I assume you meant 4.3?

I kind of agree though. I don't want to be responsible for anything that happens with the chip, but voltages are completely temperature dependent. My 1.5V is fine because the chip stays cool.

Also, the Intel specified voltage is made for the chip to last 30 years. If mine lasts 5 I'm good with that.
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post #6 of 13
Quote:
Originally Posted by xxbassplayerxx View Post
lol. I assume you meant 4.3?

I kind of agree though. I don't want to be responsible for anything that happens with the chip, but voltages are completely temperature dependent. My 1.5V is fine because the chip stays cool.

Also, the Intel specified voltage is made for the chip to last 30 years. If mine lasts 5 I'm good with that.
oops. yep. 4.3. lol
post #7 of 13
Thread Starter 
Quote:
Originally Posted by xxbassplayerxx View Post
lol. I assume you meant 4.3?

I kind of agree though. I don't want to be responsible for anything that happens with the chip, but voltages are completely temperature dependent. My 1.5V is fine because the chip stays cool.

Also, the Intel specified voltage is made for the chip to last 30 years. If mine lasts 5 I'm good with that.
Ya I know what you mean in regards to it being case by case and how temps are, I have all my settings, temps, and voltages listed here, Could you please take a look at them for me please and let me know what you suggest based on what you see?
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post #8 of 13
Hmm... seeing those temperatures for the load test on the 4GHz run, I'd say you're going to need a better cooler if you plan to go much further. For a 24/7 OC, I wouldn't recommend temperatures exceeding 80°C. With that in mind, if you've hit the voltage hole (very common), I don't think you'll make it much further.

I'll try to explain this voltage hole. Most i7's will hit 4.0GHz with around 1.2V. However, for 4.2GHz, they might require 1.4V. The voltage-speed curve is usually pretty linear until you get to a certain section where it will start to require more and more voltage for less and less clockspeed.

Are you using the stock fans that came on the H50? I've heard good things about that cooler and better things if you upgrade it to push/pull with some good fans.
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post #9 of 13
also known as diminishing returns
post #10 of 13
Quote:
Originally Posted by Deagle50ae View Post
also known as diminishing returns
Yeah! That!
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