Since card companies like to release 50 different versions of every card each with different core clocks, you always wonder how much performance gain you're paying that extra money for, don't ya? Specifically, the GTX 260 216 cards... You can get the "low end" cards stock at 576Mhz Then, you can go all out and get an XFX Black Edition at 666Mhz for about $50 more. With some of the most popular games out now like FSX, COD4, FarCry2, Crysis, whatever the game may be, what kind of performance gain would one get from the super clocked cards than one with the stock speeds? Don't say "Just buy a stock one and overclock it." I know I can do that, but that's not what I'm asking.