PowerColor Radeon HD7950 800 MHz 3GB DDR5 PCI-Express 3.0 x16 Graphics Cards AX7950 3GBD5-2DH Engine Clock: 800 MHz Video Memory: 3GB DDR5 Memory Clock: 4x 1250MHz (5.0 Gbps) Memory Interface: 384-bit Bus: PCI-Express 3.0 x16