NVIDIA today unveiled the GeForce GTX TITAN as "the world's fastest" graphics processor and the company even claims "the only [GPU] in the world powerful enough to play any game at any resolution at any time."
The NVIDIA GTX TITAN is built on the Kepler architecture. TITAN has seven billion transistors, 2668 GPU cores, 4.5 TeraFLOPS of single-precision compute power, 1.3 TeraFLOPS of double-precision compute power, GPU Boost 2.0, 6GB of GDDR5 video memory, and does support using up to three TITAN graphics cards in SLI configuration.
This ultra high-end NVIDIA GeForce graphics card will begin shipping next week at a price of $999 USD. More details can be learned at NVIDIA.com
The NVIDIA GeForce GTX TITAN will surely be supported under Linux with an imminent NVIDIA Linux graphics driver update. Nouveau will likely support it too, but there it would be a true waste to put the very expensive and powerful graphics card in a crippled state by using the open-source reverse-engineered driver. In terms of any Linux reviews and benchmarks of GTX TITAN, sadly, that's likely next to impossible