SAPPHIRE HD 7970 3GB Vapor-X Edition has the latest GDDR5 memory clocked at 6000MHz

effective, and runs with a core clock speed of 1000 MHz which with PowerTune Dynamic Boost

rises to 1050 MHz on the engine. It has a slightly less sophisticated 8-phase power design

and the versatile output configuration of Dual-link DVI-I, DVI-D, HDMI and DisplayPort.

The Vapor-X cooler is based on a new vapor chamber designed especially for this series. Heat

is carried away by four heatpipes (2 x 8mm plus 2 x 6mm), and finally dispersed by two 90mm

fan with aerofoil blades and dust repelling bearings. The Vapor-X cooler easily handles the

heat generated from the HD 7970 GHz Editions even under extreme load conditions.

Display Support 3 x Maximum Display Monitor(s) support
Output 1 x HDMI (with 3D)
1 x Single-Link DVI-D
1 x DisplayPort 1.2
1 x Dual-Link DVI-I
GPU 1000/1050(Boost) MHz Core Clock
28 nm Chip
2048 x Stream Processors
Video Memory 3072 MB Size
384 -bit GDDR5
6000 MHz Effective
Dimension 285(L)x135(W)x45(H) mm Size.
2.5 x slot

Litecoin Ming :
700 kHs

https://litecoin.info/Mining_hardware_comparison