Originally Posted by Jokah
Two things to try.
Firstly go into Nvidia control panel and in you global settings make sure power management mode is set to "prefer maximum performance".
Secondly I'd make sure that you have a high performance profile set (or created) in your computers power options. Under advanced options make sure your maximum processor power mangament option is allowing 100% performance. You could even set your minimum to 100% just to be sure while testing. If your test is successful you could always turn your minimum back down and run the test again.
EDIT: Thought I should mention that I had the same problem as you and I think it was the nvidai option that cured it.
EDIT 2: If CPUz is saying 4GHz then ignore option 2
Not sure how the nVidia control panel would help with CPU performance. There is no PhysX in 3dmark 11 and his GPU score is fine. He is 200Mhz lower then me, but is over 900 points lower in that one score(CPU).
I would try Intel Burn Test, or LinX with Furmark running and see how many GFLOPS you get OP. Do the Linx/IBT run separately, then both. You should be getting 25-26 GLFOPS with 4 threads going..