Originally Posted by Tatty_One
GDDR3 at 1600? the 1950XT's GDDR3 stocks at 1800 and is capable of 2Gig, I can only assume that they will introduce mid ranged first? saving the GDDR4 for top end.
1600mhz GDDR3 on a 512 bit bus would yield 102.4gb of memory bandwidth, 2000mhz GDDR4 would yield 128gb of bandwidth. Compared to the 1800mhz on a 256 bit bus of the x19x0 which only yields about 58gb.
GDDR3 is certainly not a bad way to go and 512mb-1gb of the stuff pushing 102gb of bandwidth is certainly nothing to laugh at. Nvidia proved that already and to my knowledge the fastest retail 8800GTX pushes its 768mb of GDDR3 at 2ghz (on its 384 bit bus), which would yield "only" 96gb of memory bandwidth.