I've been running nearly the same thing, and so far I seem to run into trouble around 250 with the stock chipset cooler.
I'm running bios 1008, mem settings at 2.5-3-3-8 1t.
When I was checking the max, I left the ht multiplier to auto.
a8n-e, 1gb corsair vs, 3000+ e6 venice, x700 pro, and...