According to this, they are using a Intel Core 2 Extreme QX9770 @ 3.20GHz
Try a Defrag, uninstall your old Drivers and get the 8.10.(I JUST updated to 8.9 and now I got to update again T_T)
I have a windowsor 5600+ @3Ghz and to test out some things, try playing Crysis, DX10 Mode, Very High Graphic settings for everything, and in the CCC set your AA to 4x and set it to edge detect. Start up fraps and play the beginning of the Crysis Campaign. If you get below an average of 20FPS then somethings wrong.
BTW, Did you try Overclocking it? I have my card set to the CCC Max OC settings. Thats 200Mhz boost in memory speed and a 40Mhz boost in Core speed.
Did you set up the manual fan speed? If not its set at 22% and doesn't throw out enough heat.
If you don't want to mess around with the profiles then download EXPERTool. You can change the speed of the 4870 from 50%-100%. I keep it at 50% for simple things, and go to 65% at gaming.