For weeks now there have been rumors swirling around the great intarweb about ATI’s upcoming high-end video card refresh – and today is the official launch date. The Radeon X1950 XTX (R580+) is practically identical to the X1900 XTX (R580) except that it uses GDDR4 clocked at 2GHz rather than GDDR3 at 1.55GHz. Yes, this is the first video card to use GDDR4. The physical amount of memory remains the same at 512MB. ATI is also launching the X1950 XTX Crossfire Edition, which sports exactly the same specifications as the standard X1950 XTX, and for the same price as well - $450 (estimated street price). But they’re not stopping there, they're also unveiling the X1900 XT 256MB, X1650 Pro and X1300 XT.