Hi guys! I have unlocked Phenom II X2 to Phenom II X4. The problem is freezing in games and in daily usage (net, music, movies). I bought new PSU Thermaltake 750w but the problem remains. When i turn off 4 core, it works ok, not freezing, maybe once in 5 days. Does this mean that the 4th core is bad and what should i do to check everything out. Thanks!