I am going to replace my old motherboard with a new one, I can keep my old AMD Athlon 64 CPU and put into the new mobo.
However, a question comes to my mind is:
Can I just un-clip the cooling fan (this is the default fan that came with AMD CPU box) sitting on the top of the CPU and remove the whole lot (ie. AMD cpu and the fan together) without separating the two so that the thermal compound still intact.
It would be better to take the heatsink (CPU fan) off entirely before removing the CPU. This will make mounting the CPU in the new motherboard much easier (if taking it all of as one piece is even possible).
And it's a good idea to clean the CPU and heatsink and reapply a good thermal compound anyway.