I finally did it. Lost the screwdriver right on the socket, and got a few broken and bend pins . It had only 4GB RAM, but after a few useless attempt to fix it, it ended up with 2GB RAM. Re-sitting the CPU didn't help either. But that's OK, killing HW is a part of pushing (and rubbing) it to the limits, anyways.

My good old DFI UT was laying around, and I'm using it for now. Maybe I get new MB later.