Thanks mate, I didn't think it was too bad for a P45 either, they can be a bit temperamental when trying to achieve high speed. I actually left all of the clock skews at 'normal' for that run - I was actually able to POST at up to 700 MHz with all skews set to 'normal' too. However I didn't have long enough with the board to really get to know it before I had to RMA it, so when I get my replacement back I will definitely be playing with it more extensively.