Sapphire Radeon X1800 XL 256MB GDDR3. Graphics processor: Radeon X1800 XL, Maximum resolution: 2560 x 1600 pixels, Processor clock speed: 500 MHz. Graphic adapter memory: 256 MB, Graphics adapter memory type: GDDR3, Memory bus: 256 bit. Interface type: PCI Express. Compatible operating systems: Microsoft Windows 98/Me/2000/XP