Originally Posted by JrRacinFan
You know something. You have something there qubit, maybe totally irrelevant.
When I had my e5200 (45nm wolfdale) rig, I had to make sure I was on the latest bios or else I wouldn't be able to make multiplier adjustments & it would be stuck at 6x just like you are describing. Very odd though as you were working just fine
Try flashing to latest/re-flashing bios. That's all i can think of as well as you have tried everything else. Only do this as last resort
I was going to mention the e5200 as well ( remember the good times we shared ?
It was caused by trying to push the FSB to far, what fixed the problem for me was shutting down the pc, unplugging the power cable and hitting the power button twice, ( the actual on switch on your pc not the psu power) forces all the power out the board so the board should be the same as when you first got it.
Give it a go, worth a try.