XFX AMD Radeon HD6870 PCIE 2GB Dual Mini Memory Interface: 256-bit Memory Clock: 4200 MHz Engine Clock: 900 MHz Chipset: Radeon HD6870 Video Memory: 2GB DDR5 Chipset: Radeon HD6870 Engine Clock: 900 MHz Video Memory: 2GB DDR5 Memory Clock: 4200 MHz Memory Interface: 256-bit Bus: PCI-Express 2.1 x16 RAMDAC: 400 MHz Stream Processors: 1120