So I have a question lads! Basically what is the difference between say the GTX 660 192-bit DDR5 and say my card, the Sapphire ATI HD 7870XT Edition 2GB 256-bit DDR5. So the difference I'm asking about is the 192-bit and the 256-bit on each cards. I understand that they are referring to the bus speeds but still am a bit confused as to what benefits or limitations it can have between the different bus speeds?I have seen many cards with 128-bit, 192-bit, 256-bit etc. But I don't really understand what effect this might have on a card? Is there a benefit to having the 256-bits on a gfx card rather than the 192-bit? Can someone please help explain this too me? Cheers Guys!