they will all oc about the same. oc is really based more on the chip itself which is luck fo the draw. leadtek might give you a couple mhz more, but nothing dramatic. now if you plan to watercool or phase chage the card, we can go into how each comapny's capacitor quality is and v core stability, but generally, buy any brand. The leadtek might oc around 2-5mhz better max.