XFX Radeon HD 6970 have GPU clock of 880MHz with 2048MB DDR5 memory. The memory clock speed is 5500MHz. The card support HD3D, Eyefinity Technology, HDMI 1.4a with support for stereoscopic 3D, Deep Color and xvyCC extended gamut.
For XFX Radeon HD 6950, the graphic card powered by 800MHz with 2048MB DDR5 memory. The memory clock speed is 5000MHz.
Both graphic card required at least 650Watt power supply.