PowerColor Radeon HD7950 880 MHz 3GB DDR5 PCI-Express 3.0 x16 Graphics Cards AX7950 3GBD5-2DHPP Engine Clock: 880 MHz Video Memory: 3GB DDR5 Memory Clock: 4 x 1250 MHz (5.0 Gbps) Memory Interface: 384-bit Bus: PCI-Express 3.0 x16