I think you looked the benchmarks over too quickly. Many of them were "lower is better." And so at a glance the scores could deceive.
There is no doubt the 2600K is a more efficient CPU by a fair margin (in terms of watts required to perform a task).
Any old CPU will do photos.
For video editing the 2600K will be the winner. Especially for future software (there are special very efficient instructions in the sandy bridge CPUs for this, that aren't in the 970).
For gaming is won't matter much which one you select as the video card will screw the performance, not the CPU.
But the 970 will win on tasks that max out 6 cores, and don't use the disk or GPU (but there aren't too many of these in real life).
You are fixated on the wrong thing. But I am repeating myself......
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