I've heard some good things and some bad things about that board - I won't be convinced of it's quality until it gets as much praise as the A7V and the KT7-R. Still, it might not be the mobos fault you can't oc more than that - try a burnin, running seti or something else to stress the cpu 100% for a few days/weeks. Also, you might need better cooling - what Vcore and temps are you running at? In my experience socket A proc's get pretty unstable at 55C+, so if you're hovering around 50C you might want to cool it some more.