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<< The cpu was working fine until I decided to replace the fan on my heatsink with a quieter one and thats where it cracked. >>
Did you try to replace the fan while the heatsink was still attached to the cpu?
Because if you did that,just getting the heatsink a bit sideways is enough to chip a corner & kill a cpu.Never mess with your heatsink when it's still on the cpu. >>
actually, its impossible to install the heatsink w/ the fan attached, you have to install the heatsink first then the fan...