I am Pretty much 100% noob when it come to OC GPU, today i decide to OC my 8800 GTS. I downloaded the riva tuner 2.05 and play around with it a little bit. and then close it, go online to find a guide to OC my 8800 GTS. After I found a guide and following the instruction, i stuck when i tried to enable drive-level hardware overclocking. here the pic before when i fisrt install it, i can go in there and tweak it but now i cant, i even reinstall it but nothing change. anyone have any idea how to fix this?