Hey thanks for the help. That get's it booting with an FSB of 400 and DDR800. I have tweaked it a little, Vcore is now 1.325V and it seems I might be able to get it lower. This gives me a good starting point. Temps are good, during Prime95 (four instances) my hottest core is 52C and my coolest is 43C. So it seems I have plenty of play room left, but I think I'm satisfied with what I have now. Maybe just tune a few things to get RAM latency down a little. Possibly try to find lowest stable Vcore.