, thanks for your really quick and useful reply. Let me explain the situation clearer.
This noise is intriguing. Have you tried going back to the standard cooler set-up?
Yes, I did. I cut a piece of 'known-good' thermal pad from the Intel north bridge chip and place it to the place where the thermal pad for the GPU should be, and when I checked it, it totally fit over the top of the GPU, the only difference between this 'new' thermal pad and the old GPU thermal pad is that the new one is 2mm thick while the old one is 1mm thick. However, the noise still stays on.
(take a look at the "Edit" part)
However I have a feeling that it may be too big, and that when you clip the cooler assembly down and it contacts the northbridge maybe it rocks a bit so that the GPU contact area is angled? (Or even tips the shim so that it's only making contact with it's edge.)
About the green
part: Yes, I did notice that the shim was too big for the GPU, but I have a logic to explain why I didn't change the size of the shim. I think, that the larger the shim is, the better heat transfer between it and the heat sink will be , and look at the heat sink size compare to the CPU,isn't it 'too big' for the CPU. So I think the shim's size isn't quite important, is that correct
About the red bold
part: Now that you mentioned it, I didn't tell you that actually the shim was uneven
on the top of the GPU, you can see that in here
(the left of the shim is higher than the right
). At the time, I didn't pay much attention ab out it, but come to think about it, there must be a high chance that when the clip is in place, the shim is angled and can touch only the GPU's edge, that explains the poor performance of the shim when I tested it. I will try the place the shim on the GPU again to check and paper sand it a little to get it even (of course, I'll sand paper it only when it's not on top of the GPU
But, this theory still doesn't explain about the source of the shrieking sound
I tried to find a picture of the bare V5250 GPU over the Internet, but still haven't found any yet. Can someone tell me about the missing corner
, is that a damage caused by the shim when it's angled?Edit:
I decided to turn the T60p on again to check, and now it seems that the sound is related to the program Video card stability check
, not the GPU's intensiveness or temperature. When I opened that program, the sound appeared
(despite the GPU's temperature was just 79 degrees C at the time), but it disappeared at once when I closed the program
. And, when I tried to play Counter Strike with the machine, the GPU's temperature rocketed to 87 degrees but the sound still didn't come
Can anybody test your machine with the program Video card stability check
, and tell me if you get the noise or not? That will definitely help me a lot finding the source or the noise. Thanks in advance.
Thank everyone for reading this thread, I'm really frustrated with that sound now