Stop speculating like that Sascha It sounds like me and Pieter are some first timers with our motherboards.
No one noticed Pt1t reply in the first page? Biostar have got the same issues with their early boards and with these sockets. They installed cooler a bit too tight and zzzzip!

Two different CPU's. Different voltages and different configurations. Both sockets are burned from VCC and VSS pin area. It is not coincidence.
I think I know the reason. Too heavy compression to socket and CPU. My LN2 pot is usually tightened very well, so this might be as simple as that.

My own fault

Only advice is that do not bend the board and do not use too much force when installine LN2 pot or some other cooler.