At the same time, the company has decided to release an R580-based Radeon X1900 GT card and we expect to see it in early May, probably the second week of that month.More info over here.
Sources close to company suggest that ATI doesn’t have a shortage of R580 production, but it claims it doesn’t have enough fall-out chips - those unable to reach the top frequency and have under-powered pipes inside. This is how you usually make the slower variations, as not all the chips will work at the desired 650MHz frequency.
In ATIs case, most of its R580 chips will work at either 650MHz and assume the guise of an XTX card, or will work at 625MHz and become an X1900 XT card.
ATI to release R580s as Radeon X1900s
Posted on Wednesday, Apr 26 2006 @ 00:25 CEST by Thomas De Maesschalck