Phoronix: Multi-GPU Lucid Hydra On Linux: No Plans Yet

Last year the Lucid Hydra 200 was announced as a unique, universal multi-GPU solution. The Hydra 200 is a custom chipset that allows the graphics rendering workload to be split between multiple graphics processors, but the graphics cards do not need to be tied to a particular vendor...

http://www.phoronix.com/vr.php?view=ODA0NA