@kaap
I'm not familiar with the heaven bench, but would the ~800mhz loss on the 4930k (290x) @1600p run make a lot of difference? (4.8 @1080 vs 4 @1600)
@1600p it does not make a huge difference, when I did the run on the 290Xs I was just testing out the cards but thought afterwards that I may as well post the score. If I had run the 4930k @4.8 I may have scored about another 50 points or so but not enough to get near the Titans.
@1080p it is a different story and the CPU is a massive bottleneck, the 290Xs are less powerful than the Titans but work more efficiently when approaching a CPU bottleneck on Heaven 4. This is why they can pass the Titans 4 up @1080p.
If I was using LN2 cooling just for the CPU @1080p I would be looking to score about 6400 on the Titans and about 6100 on the 290Xs.