I have a XFX 680i LT Mobo, Q6600 clocked @ 2.4ghz stock and a NVidia Geforce 280 GTX…
I have read a couple reviews and I think that my CPU clock might be holding back my GPU from functioning fully.. any thoughts? 
Hmmm, your cpu is still pretty decent but your vid card certain out paces it. I’m not sure what you’re trying to put your rig through but I could see you benefiting from a more robust processor.
If you think you’re in the market for an upgrade any of these processors will fit the socket of you motherboard.