I'm pretty sure this is the worst board/BIOS I've ever seen now. (X38-DQ6)

Using any BIOS other than the original F3 (including the new F7) causes my system to immediately become unstable to the point where XP and Vista both will not even boot and Memtest throws tons of errors.

I RMAed the RAM, (G.Skill PC800 from newegg), same exact issue. I returned that RAM and got the PC1000 kit - same exact issue.

I'm not overclocking at all - this is absolutely stock settings.

With the F3 bios, everything's perfectly stable - Windows boots, I can run memtest for days without error, games are fine etc. I want to try OCing though and need the later BIOSes for the extra OC stuff in there.

Anyone else seen anything like this? It's the craziest thing I've seen in 10 years of building systems.

Ryan