if I'm sure is the Rev1.1, another fact it is that also tried to use the Athlon II X3 440 and no walks in this motheboard while another if it works, I've tried the Athlon II X3 440 and the Phenom X3 8450 and no of the two works I have it with bios f6 and so I put on the f6, with this motherboard from a friend is where I tested the processors, ASRock N68C-GS4