Using some guides on the forums here, I've bumped the FSB from the default 333mhz up to 400mhz. I left the multiplier at the default 8, so it's running at 3.2ghz. I left the PCIE at the default setting of 100mhz, and set the RAM/FSB ratio to "unlinked", keeping the RAM at the default 800mhz. I haven't touched any other RAM settings (timings are all set to "auto").
I started out with the vcore at 1.25, but the system keeps locking up at random (sometimes it does it at idle). So, I've slowly stepped it up to where it is now at 1.33 (haven't stress-tested at this level yet). I don't have any temperature problems--even during stress test the core temps seem to level off around 45C (I'm using CPUID Hardware Monitor for temps and Prime95 for stress).
So here's my newbie question:
Are the system lock-ups I'm having probably a result of the vcore being too low (i.e., should I keep pushing it higher)? Or is it possible that I need to adjust the other voltages or memory timings or something?