I have a lenovo r500 bought second hand in excellent condition.
Originally it had a T5870 @2.0 800mhz fsb and Ati hd 3470 graphics. It could handle moderate gaming at 30 fps (league of legends at high settings)
Then i had the (bad it seems) idea to uphrade the cpu to T9600 (2.8 1066), i saw big improvement like 40% better performance. 40 to 50 fps. But it started overheating after 2 hours and drop to zero fps for several minutes.
When upgrading i replaced the thermal paste on cpu and gpu with a white silicon based, but i kept the thermal pad on northbrige(?) Second time i opened cleaned and replaced again with very small dots this time and cut the thermal pad to the size of the chipset because it was larger to the size of the hs.
Same problems. Third time i opened and replaced everything with new thermal paste grey this time. Nothing better.
Im running hw monitor and gpu gets above 80 C and northbridge over 95 to 101 C cpu doesnt eve get nuch load or high temp.
I dont know whats the problem maybe not the new cpu itself but the fact that it runs at higjer voltage and fsb causes overheating to other chipsets?
I can only think of replacing back with the previous one. Any suggestions?
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It could be that you bought a used T9600 CPU that had been hugely overclocked.
Also check that you have the correct heatsink for ATI discrete graphics: 44C0800
(Integrated graphics has 44C0799)
Check that the Northbridge thermal pad on the heatsink has the correct thickness
Sounds to me like you might also do something wrong (too much? / wrong type?) with the thermal paste.
Clean it off with something like Isopropyl Alcohol (91%) (Pharmacy or Supermarket).
Then put on Arctic Silver 5 (AS5) thermal paste as per instructions here: http://www.arcticsilver.com/pdf/appmeth ... d_v1.1.pdf
Finally, when you mount it back, put in all the screws, then take them out again and lift up the heatsink, to check on its bottom, that both CPU and GPU made full contact.
(Heatsink should have the full "shapes" of both chips in thermal paste).
If so, put it back and try again.
If not OK, the heatsink may be bent or has cracked tubes, or...
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Though i have to exclude any hs damage as it seems in good shape.
I will reaply paste as the instructions on that pdf i will buy artic silver i guess, and new pad i guess as now i have paste instead
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So problem solved
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