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CPU stain on the pin side - Page 2

post #11 of 13
Well.... it also depends. If it is AS5 or some other conductive TIM and bridging more than one pin, I would definitely clean it. If it is non-conductive like Ceramique and only partially staining a pin, it should be ok to simply scrub it off.
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post #12 of 13
I think it's just discoloration. I've got that on my E5300 after 6 months of use. Might be just fingerprint oils or something
post #13 of 13
When in doubt, get some residue free solvent and a lint free cloth and scrub it clean.

A CPU is made of:

Nickel plated copper IHS
Solder
Silicon die
Fiber reinforced resin substrate
Gold plated copper pads or pins
and some surface mount solid capacitors

These materials are rather durable. Even prolonged exposure to fairly powerful solvents won't harm most CPUs.
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