Of course, we are curious to compare the Radeon HD 7990 and the GeForce GTX 690. Since the Nvidia card had been released earlier, it serves as the baseline in these diagrams:
So the AMD Radeon HD 7990 is slower than the GeForce GTX 690 in Total War: Shogun 2 – Fall of the Samurai and Metro: Last Light (with enabled Advanced PhysX). In the rest of the tests from our program, the two cards are equals or the AMD Radeon HD 7990 is ahead. The latter only enjoys a large advantage in two games, though: Tomb Raider and Hitman: Absolution. If we calculate the average difference between their results across all the tests and test modes, we find it to be zero. So, the two cards are equal to each other overall.
As for the third $1000 product, it has been far from brilliant today. For example, the Radeon HD 7990 is 19 to 25% faster than the GeForce GTX Titan at 1920x1080 and 20-25% faster at 2560x1440.
The GeForce GTX 690, in its turn, is 19-24% and 22-23% faster than the Titan at the mentioned resolutions.