3dmark problems

Hi there, not sure if anyone can help but something very strange is going on with 3d mark.

I ran it a few days ago and achieved a score of 42,648 , GPU 42,648 and overal 3dmark score of 21,107.

I had a little play about with TurboV today and overclocked it to about the same as the core i7 965 (3.2ghz) but it was unstable so went into the bios and clocked it to 3.0ghz. I went to put it back to stock (I plan to overclock it efficiently when i have more time), but first thought i would run 3dmark again to see the difference. These are the results i got..
CPU 43188 (slight improvment), GPU 8111 (WHAT!?!) 3dmark score 0 (!). Now i have gone back and set everything to default and i am still getting the same higher CPU mark and low GPU and nothing for 3dmark.

Has anyone got anyidea what the problem is? i have had a look on the forums and checked the power usage profile is correct, and i have reinstalled 3dmark. All the drivers are the same and so on. The only changes i made between the first test and clock test was reducing the page file and stoping a few unnecersery processes. I have put the pagefile back (left the processes as my pc is running smoother)

Does anyone know what is wrong?

i7 940@2.93(stock)
asus p6t
6gig ocz ram
bfg 295gtx
vista 64 pro sp1