aldamon ,

I have the same memory as you .
I've put +0.2 on mch , +0.1 fsb and normal on pci-x .
Bios is now F11b . My memory runs 4-4-4-5 48hour orthos stable .
4-4-3-5 will make orthos crash after 9 hours .
I am running 470 fsb 1:1

Also keep in mind I can only put +0.3 on the dimms , which is 2.06 real V .
If I put more the board will not post .

I also noticed the F11b bios has very slightly less vdroop , but not enough to drop voltage on the cpu in my case .