I hate to say this but even a Q6600 has a hard time running supreme commander, so don't expect blazing speeds. I have this game and a 8800GTS 320mb can not play all the setttings on high smoothly. I overclocked my Q6600 to 3Ghz, and it helped some during late in the game where everyone has 500+units. You also need A LOT of ram. IF you run Windows XP, each program is limited to 2gigs, so even though you may have the maximum supported 4 gigs, Windows XP limits each program to 2gigs. This is a huge problem because when playing on larger maps, the 2gig limit is reached and your computer crashes. This is a very common problem for us Quad people, since people with Quad cpus wants to play big maps with many units. I had to page 4gigs of my fastest HD to satisfy the needs of Supcom, and even with that, it's still crashes on large maps.