Hey guys,

I got this board as part of my new machine last weekend and I'm having a strange issue:

Specs:
Corsair HX620 PSU
GA-X38-DQ6
Q6600 G0 - TT V1 cooler
G.Skill DDR2 800 2X2GB (5-5-5-15 SPD)
BFG 8800GT OC
2X WD SATA2 250GB
LG SATA 20X DVD
Vista x64 / XP Pro dual boot

I'm just trying to get the system stable at stock speeds right now - not even trying to OC it yet.

1. Under any BIOS other than F3, I can't get anything other than AUTO memory settings to run, which means 400Mhz with the 4:5 divider. I've been told 1:1 is optimal, but setting the divider to 2.00A causes the system to either not POST or error like crazy in Memtest. As soon as I go back to AUTO, it'll pass Memtest overnight and do hours of Prime95 just fine. With the F3 BIOS, the same is true, I can run it fine at 1:1 (266MHz) It feels sluggish though, like it's not quite as snappy as it should be.

I really don't understand why this would be the case that it's unstable at a LOWER memory speed than at the higher 400MHz one. I want to be able to run the latest BIOSes for the extra features etc...

Any idea what could be wrong here?

Thanks!
Ryan