Hey. I just bought a phenom II X2 555 and I succesfully unlocked the other 2 cores.. My problem is that under pressurd it freezes.. For example at COD black ops, after a few minutes it freezes. What could possibly be the problem? I have a gigabyte mobo with amd 740g chip and sb710 bridge. I barely touched the voltages, only the cpu's by +0.075.. Any ideas?