Tesla K20 Game Requirement Analysis
Tesla K20 is a professional GPU for server and workstation purposes.
It's designed to solve the most complex high performance computing problems out there and based on the Kepler GK110, with a CUDA Count of 2496 but the drivers aren't certified for games. Therefore, even if Tesla K20 is powerful enough for even the most demanding games, it might not be compatible.
Tesla K20 is NVIDIA'S second most powerful server solution as of November 2012 and still more efficient compared to the Fermi based Professional GPUs since the Kepler's Shaders are thrice as efficient as Fermi Shaders.