Heaven Benchmark, an unbiased, GPU-intensive benchmark with nearly two million of active users, is released with a new version 4.0. Powered by a cutting-edge UNIGINE Engine and running on Windows, Linux and Mac OS X, it is trusted by overclockers and hardware manufacturers all over the world for loading their graphics cards to the limits.
More detailed information can be found here - http://unigine.com/products/heaven/