Originally Posted by CaptNKILL
The setup looks fine to me.
The Q9450 is a nice CPU. My brother's Q9400 overclocked to 3.66Ghz on an older Thermalright cooler (not a tower) and it barely goes over 50C under Prime95 load.
With a TRUE you might be able to hit 4Ghz or more if your ram gives you enough FSB head room.
I'm not so sure he will be able to get anything stable over 1800fsb on a 780i. Even that is a stretch IMO. 1800fsb would put him at 3.6ghz, but I'm more likely predicting 3.2ghz as being the highest stable clock.
@Verboten: Are you being limited right now? What monitor are you pairing with those cards?
The E8400 would definitely give you a higher clock speed because it has a 9x multiplier instead of an 8x. I'd predict you could get that chip to 3.6 - 4.0ghz on your board.
You can try a processor swap if you want to play around, and you might be able to get a nice little boost from it, but I think just pushing that Q9450 to 3.0ghz or so will be good enough for everything to run well.
Actually doing a little more digging I don't think that your Q9450 and the 680i board are going to like each other. It may work but you might have a world of grief on your hands.