Quote Originally Posted by Ravynmagi View Post
First off, I'd like to shove a hot poker into the eyes of ya'll that got 4GHz with low voltage. Yes, I'm maliciously envious.

Anyway, I just got my second Q9550 since the first was so horrible (it had troubles at stock speeds). My second Q9550 seems to be doing much better. But it seems 4GHz is not gonna happen for me.

I'm at 3.8GHz now and Prime 95 ran for about 10 hours with 1.36 vcore and 1.20 vtt except for CPU3 which failed after 6 hours. Both GTLREFs are at 63%. Should I raise the second GTLREF up to 65%?
Not the best board for OC'ing a Quad your vdroop is soooo bad I can't imagine you being able to get 4Ghz with that board and this chip unless you run it at about 1.5 and allow for the vdroop to take you to 1.4 or even worse 1.37 give or take.. Your problem is the board not the chip...