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The OpenGL Speed & Perf-Per-Watt From The Radeon HD 2000/3000 Series Through The R9 Fury

Unigine Valley could run on all of the hardware, albeit at a snails pace on the very oldest of the graphics cards benchmarked. From the Radeon HD 3850 to R9 290 is around a 28x improvement in performance.

The power efficiency has improved a great deal with the GCN GPUs.