A máme to potvrzený

X1900GTO
R580
3 active quads (= 12TMUs, 36PSPs)@500MHz
256bit 256MB GDDR3@500MHz (1GHz effective)
$349

X1900XL
R580
all quads active (= 16TMUs, 48PSPs)@500MHz
256bit 256MB GDDR3@500MHz (1GHz effective)
$399

X1900GTO zřejmě nahradí X1800XL a X1900XL nahradí X1800XT 256MB.