NVIDIA GeForce GTX TITAN SLI & Tri-SLI @ techPowerUp
 

We compare one, two and three GeForce TITAN cards in our multi-GPU comparison on X79. The cards will have to fight against three HD 7970 GHz Editions, two GTX 690s and three GTX 680s to settle the argument: what is the fastest graphics solution you can buy today?

http://www.techpowerup.com/reviews/N...GTX_Titan_SLI/