Quote Originally Posted by Phoenix_TT View Post
I must be really unlucky because my XMS2 6400c4 memory has microns as the sticker on my modules says it's rev 1.1 and I can't get it to boot with FSB at 400 and manual memory timings of 4-4-4-12. Even at stock FSB speed, it doesn't work with manual memory timings of 4-4-4-12, maybe because the board has problems with the 2:3 ratio (is that correct ?)

And yes I'm setting the memory voltage to be 2.1v
If I'm not mistaken, 2:3 is very problematic on this board when you start getting up in fsb speeds. I know you shouldn't have any issues doing 4:5 though (I've personally done it up to ~950ish fsb stable with my corsair pc2-8500s).

2.1v *should* be enough, however you may want to try 2.2 or even 2.3, however I'd highly recommend running a fan nearby to displace some of the heat that it will cause.

There was a great article I read the other day on cas latencies vs higher fsb with c2d cpus (but focusing on nforce680 chipset since you could asynchronously split cpu ram fsbs). One of the sidenotes was operating temperatures of ram and voltages required to hit the higher fsbs. I think at 2.2-2.4v, some of the sticks got up to the 50s or even 60s C!