I have overclocked a Q6600 to 3.2 GHZ and have an 8800GTX and can only run at mediumish settings when playing large games with 2-3 AI. Just fyi, this game is massive when you have a lot of units built up (slow framerates)
_________Gaming Rig__________
C2Q Q6600 (2.4GHz) @ 3.21GHz & 1.328Vcore
eVGA 680i SLI (A1 Version)
OCZ 2GB DDR2 1066MHz @ 1426MHz 5-5-5-15 2T
eVGA 8800GTX
OCZ GameXStream 600W
RaptorX 150, Seagate 320 SATA PR
XP Pro 32-Bit
Razer Barracuda AC-1 + Barracuda HP-1
Logitech Z-5500
Thermaltake Shark Full ATX
Zalman 9500
Olevia 27" LCD HDTV