3DMark is a computer benchmarking tool created and developed by Futuremark Corporation (formerly MadOnion.com and initially Futuremark) to determine the performance of a computer's 3D graphic rendering and CPU workload processing capabilities. Running 3DMark produces a 3DMark score, with higher numbers indicating better performance. The 3DMark measurement unit is intended to give a normalized mean for comparing different PC hardware configurations (mostly graphics processing units and central processing units), which proponents such as gamers and overclocking enthusiasts assert is indicative of end-user performance capabilities.

Many versions of 3DMark have been released since 1998. As each 3DMark is based on a specific version of the DirectX API scores cannot be compared across the different releases.

Read more about 3DMark:  Versions, 3DMarkMobile