Heaven Benchmark with its current version 4.0 is a GPU-intensive benchmark that hammers graphics cards to the limits. This powerful tool can be effectively used to determine the stability of a GPU under extremely stressful conditions, as well as check the cooling system's potential under maximum heat output. It provides completely unbiased results and generates true in-game rendering workloads across all platforms, such as Windows, Linux and Mac OS X.
We used the settings, shown in the image above.
We recorded noticeable improvements when moving from the HD5870 to the new Sapphire HD7950 MAC Edition. The difference in average frame rate translates to 46.7%.