P4PE and memory timings

Anyone know if there is a limit for memory timings on this board, or chipset? I just got some Mushkin Level 2, and if i even touch one of the timings it won't boot. By SPD runs 2.5-3-3-7, and manual at 2.5-3-3-7 works too. But if I even lower one it won't boot.

Mind boggling! Anyone have a solution? A hacked bios maybe? (link?)

have you tried different slots?
did you run memtest?
have you tried running with one stick at a time?
maybe one of them is bad.

Had memtest going all last night, 0 errors. I could try one at a time, but I think memtest would be spewing errors if the memory was bad ::

I'll try one stick, see what it does, then report.

Ok, tried both sticks seperate. Figured out I can get 2-3-2-5. If I change CAS to RAS though it won't boot (to windows). Says missing/corrupt file in System32/Config/System. Any ideas?

try upping ur vmem to 2.9