Review: AMD HD 7950 vs. HD 7970 - at the same clocks

Power-draw, temps, noise

Fewer processing cores offers up the benefit of lower in-game power consumption. Also, the HD 7950's default voltage is lower than the HD 7970's.

Both reference cards share what seems to be an identical heatsink. The HD 7950's runs a little quieter because the GPU's a bit cooler and more energy-efficient.