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Cathar · 07-01-2003, 06:20 PM

P4's are very strange beasts. I'm not sure what the exact deal is. Volenti and I have both seen weird temperature behavior on them. You can get one P4 and its temperatures will be greatly lowered by one block over another. Typically this is for a P4 that was reading fairly high temperatures (>40C) in the first place.

Then you can get another P4, once that tends to read no higher than 35C or so no matter what you do, and the temperatures don't seem to be effected as much.

I'm unsure whether this is due to processor yield creating different chip resistances and hence lower heat, or due to bogus temperature reporting, or what. All I know is that the P4's are extremely hard to get any form of reliable relative information out of them from CPU to CPU.

For the AMD CPU's, it seems to be much more consistent, although for certain types of motherboards and setups, you can still get some weird "non-difference" behavior as well, but this behavior seems to be rarer for AMD's.

07-01-2003, 06:20 PM	#222
Cathar Thermophile Join Date: Sep 2002 Location: Melbourne, Australia Posts: 2,538	P4's are very strange beasts. I'm not sure what the exact deal is. Volenti and I have both seen weird temperature behavior on them. You can get one P4 and its temperatures will be greatly lowered by one block over another. Typically this is for a P4 that was reading fairly high temperatures (>40C) in the first place. Then you can get another P4, once that tends to read no higher than 35C or so no matter what you do, and the temperatures don't seem to be effected as much. I'm unsure whether this is due to processor yield creating different chip resistances and hence lower heat, or due to bogus temperature reporting, or what. All I know is that the P4's are extremely hard to get any form of reliable relative information out of them from CPU to CPU. For the AMD CPU's, it seems to be much more consistent, although for certain types of motherboards and setups, you can still get some weird "non-difference" behavior as well, but this behavior seems to be rarer for AMD's.