I was looking to upgrade from my 8800 gts 640mb to either the gts 450 or the gtx 460. my question is that the 450 has 192 stream processors while the 460 has 336, would i really notice the performance difference in 144 more sp. Also about the memory interface, one is 128 bit and the other is 256 bit, would that be much of a difference. I was wondering because if i do get the gts 450 i would probably try sli because it wouldnt be that much more than the single gtx460.