How to OC Graphics

I have asus SLI mobo (as sig below)

How do i oc the graphics?

I assume you have nvidia graphics cards? (not in your sig) if so, go download coolbits from guru3d.com and youre sorted, ATI you need to use rivatuner or somesuch (never had an ati card)

Thanks for that.

Card is the last item on my sig. :-)

That it is. YOU might also want to try the gainward expertool, im not sure if it works for other models of card, but that will let you control fan speeds also.

RivaTuner, originally developed for nVidia, so i guess you could make use of this