FurMark is a very intensive OpenGL benchmark that uses fur rendering
algorithms to measure the performance of the graphics card. Fur
rendering is especially adapted to overheat the GPU and that’s why
FurMark is also a perfect stability and stress test tool (also called
GPU burner) for the graphics card.
The benchmark was rendered in full screen mode with no AA enabled on both video cards.
Benchmark Results: The Sapphire Radeon HD 5870 Vapor-X was 3 FPS faster than a reference ATI Radeon HD 5870 in the Furmark benchmark test.