@whizzer: Only had that boot issue with 803. I won't try it again too soon, hopefully the next bios release doesn't have that strange bug anymore.

@mrbusa: Did some further testing. I can run 2 sticks at 4-4-4 1T fine up to ~920MHz with ~2.15V, 4 sticks at 4-4-4 1T up to ~880MHz. Quite fine for me as I'm running it sync at 433MHz FSB anyhow