Ok, thanks.
The 280X is just a rebranded 7970 though and while I'm in the dark whats happening under the hood in PPCC2014, you can clearly see that a lot of compute power is available on the 290X which surpasses even the Titan in several of these tests.
I was just hoping we'd see some improvements to the OpenCL implementation in Premiere..
Prolly go for the 780Ti then.