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Intel 640 at 4.0 GHz 43°C

post #1 of 9
Thread Starter 
i have just gone and overclocked my intel prescott 3.2ghz 640 up to 4.0GHz. i upped the VCore and the RAM and left it idle for a minute or two. i was amazed to see that it was only 43 degrees C at idle with just silicone paste and a freezer 7 cooler. i havnt tested it under load yet but i have a zalman cnps9500-led and some as5 coming some time this week so i will wait until then.

do you think i could overclock it any higher?
    
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post #2 of 9
I'd say you test your machine under load before taking the oc any higher.
The reason I'm saying you should test before resuming your oc`ing attempts is because you need to know if your machine is stable before taking it higher.
Granted, temperatures are part of stability but load temps count the most.

What is your current vcore ? You have a Prescott and, as such, you should stick below 1.525V (max safe vcore recommended for Prescotts).
As for load temps... try to keep them under 60C (although 66.7C is the maximum temp theoretically recommended for a P4 640).
Good luck !
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post #3 of 9
Thread Starter 
oh i forgot to post the screenshot. thats got all the info on it.
    
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post #4 of 9
YEAH...is it stable ?
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post #5 of 9
Well there are two vcore/cpucore numbers on the screenshot you posted.
To the left there's CPUCore: 1.42 and to the right there's VCore 1.5875V.

While it's normal to get fluctuations when using software based readings I wouldn't raise that vcore anymore if I was you. Even if you seem to have good temps (which we don't know yet since you haven't tested your system under load) you should keep in mind that raising the voltage too much can instantly fry your cpu.
Did you manually set the vcore in the bios or is it on "Auto" and the OC`Guru is automatically setting it ?
One last thing... your PCIE clock seems to be on "Auto" can you try to lock it at 100MHz and see what happens ?
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post #6 of 9
I keep mine under 55c. loaded, also you want to set your pci-e bus at 100, if its on auto they tend to change when overclocking, that zalman cooler will also hold you back some, I had on and didn't like the temps, the Typhoon on mine keeps it at 41c. loaded, and it folds 24/7.
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post #7 of 9
Thread Starter 
what is the reason for keeping the pci-e bus at 100?
    
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post #8 of 9
Because you don't want to mess with devices that rely on the pci-express bus like your video card for example.
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post #9 of 9
Quote:
Originally Posted by elmarko99
what is the reason for keeping the pci-e bus at 100?
Actually, for ATI cards set the speed to 105, for nvidia set it to 100.
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