Asrock Dual939 SATA2 problems after flashing bios

I have just bought a Geforce 6800 GS XXX PCIe, which ran great on my computer:

Athlon 64 3200
1gb ddr 400 Ram
Asrock Dual939 SATA2 Motherboard
160gb HDD
500w power supply

All was working well until i had a problem with my memory so after reading a few forums i decided to upgrade my bios to version 1.5. After doing so all the settings were reset (as i new they would be) so i set them all back to normal or so i thought, but somthing is wrong, i was getting 12000 on 3d mark 03 now at most i get 8000, with some settings i get as low as 2000.

Does anyone have any idea's how to fix this? Am i just missing a setting in the bios? I have the latest drivers and i've also tried earlier versions none of which work.

Thanks for any help

Gav Jensen