Sapphire ATI Radeon X550 ADVT 256MB 128-Bit PCIe x16 Video Card 1024-HC49-0C-SA Brand: Sapphire Video Card Model: 1024-HC49-0C-SA GPU: ATI Radeon X550 Advantage 3D API: DirectX 9, OpenGL 2.0 Interface: PCIe 1.0 x16