Another Q6600 noob here..
Just trying out different configs for Q6600 + Asus P5NT-WS (680i board)
Got stable system at 3.06GHz: 340MHz FSB, with VCore 1.4v - memory still at 800MHz an 1.8v, runs Prime95 okay. CPU temps 35 idle, 49 load.
Change to 350MHz FSB and if won't even complete...