They dont really mean anything at all to me except one way made in an eariler batch than the other. The AX might be the eariler batch and could have a greater chance to unlock, but that can not be promised.
Either will be fine, just make sure the bundles are the same, that's the only other thing I could think of.
there is a 6600gt for 159.99 and this card is for $209.99. Which would you reccomend, he is building a system so he would need money for other parts. He is getting 1 gb value corsair ram, Nf3 250, sckt 754 3000+.
so with those parts will the 6600gt do good? he mostly plays CS:S and will most likely play BF2 and Fear.