guys,
quick question about memory frequency, straps, and FSB:

on my Asus P5Q-E:
I had my RAM frequency in AUTO, with timings at 4-4-4-12, and Vram=2.02v..... it was running fine, until I started to mess with CPU ration settings from Auto to 9.0. Now, it starts to hang up. I initally had my Vcore at 1.29 and was running great, but now even with 1.31 is crashing on occasion.
Anyways, looks like my RAM is my limiting factor at this point. My question is, what's the best way to setup the RAM frequency, so that it doesn't get affected by the higher FSB? should I force it to DDR2-800 or 900 or so, or leave it in auto?

I want to shoot for 450fsb (4ghz) with 1.3Vcore, and let the ram timings and frequency be what they need to be to be stable here.

any help is appreciated!