Recently we were testing a lot of x2 550-555-560 cpu's and discovered that there are some, which doesen't even start as x4 B50-55-60 in a mobo which has DDR3 memory, but if you put these in a board with DDR2 memory support than some of them works perfectly as x4 B50-55-60 with 3 or all 4 core's activated!
So i think there are a lot of phenom x2-x3 cpu's with defective ddr3 memory controllers, which work perfectly as a dual core, but when you try to unlock them with ddr3 mem intstold, they simply play dead...
I hope you understood what i was trying to tell
Sorry about the bad language anyways
So this may give a little hope to some of you who wanted to unlock and did not succed;
try the cpu in a mobo with ddr2 memory on 667 Mhz and you might see the light at the end of the tunnel