Boost performance on ASUS N6600 TD Agp
 

So , i have a nvidia 6600 and i want to o/c ...... someone aid me !

Go ahead and download rivatuner first, it's a good (not great, although it has plenty of features) overclocking program. Then I say download ATItool, it also works with some Nvidia cards, and it's the best overclocking tool I ever used. If you have an Nforce chipset (motherboard), you can download Ntune from Nvidia, it's the 2nd best overclocking utility out there.