Sapphire Radeon X550. Graphics processor: Radeon X550, Maximum resolution: 2048 x 1536 pixels. Graphic adapter memory: 256 MB, Graphics adapter memory type: DDR, Memory bus: 128 bit. Interface type: PCI Express. Minimum system requirements: 1 x PCI Express 300 Watt power supply, Minimum processor: Intel Pentuim 4 / AMD Athlon, Minimum RAM: 256 MB. Compatible operating systems: Windows 2000/XP