ok, Settings for 2.5Ghz 2.0nb:
Core FID 09
VID 024
DID Divide by 1
NB FID 06
VID 036
DID Divide by 1

Settings for 2.7Ghz
Core FID 11
VID 023
DID 1
Same as before on the NB.

According to AMD power monitor, at 2.5Ghz VID 024, the core voltage was 1.25 on all cores. That was rock solid stable, even with C&C enabled, did gaming, and benching no problems at all. Nb voltage reading on AMD pow monitor is 1.1v

With my 2.7Ghz settings AMD power monitor shows 1.2625v per core, currently running with C&Q disabled, so that may help. Good results so far, no instability after reboot and been benching the whole time. If I have the reboot problem again I'll raise the setting a bit again like you suggested KTE.

Only problem I had before with C&Q enabled was that rare reboot where it wouldn't start the monitor programs. The amusing thing, is on those particular boots, Yahoo messenger that starts with windows would start and run just fine. And my temp shows no difference between running at 2.7 or 2.5, Idle or load. Never goes above 40c cpu temp. The case layout may be helping with that one though. Have the Raidmax Smilodon, with the 120mm rear exhaust fan. Have the nirvana oriented to blow through the cooler toward the rear of the case, so the rear exhaust acts as a pull fan for the cooler. On that note thats also how I ended up with the Raidmax PSU, got em as a combo deal, $25 off from the combo, 70 rebate for the PSU and 40 rebate for the case.

But, then again, the RAM and PSU are more or less hold overs until I can afford to get a decent unit, though going by the price I could of ended up getting a decent 600w psu from a better brand. Didn't know how infamous Raidmax PSU's were till after I sent in for the rebate.

And intersting results, I installed WinXP SP3 and performance on most benchies in Everest jumped by between 500 and 1000 points, just while running at 2.5Ghz.