Thread Revival. Modest overclock, but I only wanted QX9770 performance. I'm running my RAM at its EPP timings @1.9v, 400MHz 1:1 speed.
http://valid.canardpc.com/cache/screenshot/1072714.png
Only took me about 30-40 minutes to get my tweaks the way I wanted it; it's run 45 minutes of Prime95 after that stable, a full 3DMark Vantage run, a 32 million digit run of HyperPi, and an hour of FallOut 3, all fine.
Vcore is on auto. Migelo, I'm surprised you need 1.496, that seems high to me for a Q9450, but maybe it's just me. I've never used a 780i board, and it may be that a P45 works better in this situation.