The only data for 290x that we have is the reference AMD model. The problem with the AMD model is that the cooling system is bad. I am waiting for Asus, Sapphire editions of the card (yes, I do strongly prefer those brands) to see if that helps the overheating problem. Going by the recent benchmarks, the 290x can beat the Titan if it did not overheat so much, and drive the GPU core down to 800 and sometimes 700ish (instead of 1000+) MHz. That is, of course a speculation. We will see when other brands release 290X with their own cooling systems.