We've asked around how far can you push and issue a warranty on Geforce GTX 280, as most of the partners stop at 670MHz and no one dares to go for magical 700MHz.

Geforce GTX 280 is a very hot card even at its default clock, and we've learned that 670MHz is something that Nvidia recommends; and anything higher than that is pushing your luck.

Zotac, on the other hand, clocked its card to 700MHz, while XFX and EVGA, both daring overclockers, have decided to stick around with 670MHz on air.

EVGA plans to ship the cards at 670MHz and it is up to you to overclock it further, but we are not sure that you will gain that much performance with that overclock; and at the same time you are risking killing your super expensive graphics card.

The choice is always yours.