VisionTek Products VisionTek Radeon R9 280 3GB GDDR5 PCI Express Graphics Card 900689 Graphics Engine: RADEON R9 280X Video Memory: 3GB GDDR5 Memory Interface: 384-bit DirectX Support: 11.2 Bus Standard: PCI Express 3.0 Core Speed: 850MHz (1000Mhz boost) Memory Speed: 1500MHz x4 (6Gbps) Warranty: Limited Lifetime