And why would you risk messing up a perfectly working CPU just to get at best 5-10c advantage ?
Hahaha you're talking to the wrong guy here. I only asked because the last time I did something like this was with an athlon 64 X2, in which the heat spreader was not soldered to the CPU die at all. I would have to check if newer processors are indeed soldered, as the thermal compound they use between the die and the heat spreader can behave strikingly like solder given enough pressure and heat from regular usage. Thus, it might be easier to remove it from an unused chip. Furthermore, if you know exactly what you're doing, the risk is negligible. Also, the amount of pressure does not matter as long as there is some
. The arctic silver 5 or whatever you're using will take care of the rest.
You'd be surprised how much pressure those dies can take, anyways. Hell, back in the day I used to have to push down on the old athlon XP's with all my strength just to get the damn heatsink on with those terrible clips they used. That's much much more force than even a 1kg heatsink will exert, especially since the heatsink would be sticking out parallel to the ground, meaning gravity is not much of a factor.