Well, how about Cinebench 11.5?
i7-2600k @ 5.0Ghz scores 10 pts.
A10-6800k @ 5.0Ghz scores 4 pts.
Since Haswell is more powerful, it's around 1/3, not 2/3.
1. Cinebench is a well known Intel optimized/compiled piece of software, as a consequence, it's biased towards Intel hardware IDs to begin with, maybe even made to use Intel tech, while ignoring AMD ones.
2.
i7-2600K @ 5GHz scores ~9,5 points, not 10.
A10-6800K @ 5GHz scores at least 4,1 points, not 4 (A10-5800K @ 4,6-4,8GHz scores 4 points).
Don't rounds stuff up just for the sake of making an argument.
3. i7-2600K is 8 threads, A10-6800K is 4 threads(cores), i5-2500K would have been a much more fitting comparison, but seeing as how you're talking about pure x86 performance, I can't stress enough how wrong the place where you're looking for it is.
4. i7-2600K's can't do 5GHz all that easy, by a preliminary sight, the A10-6800K CAN do 5GHz a tad more often. Hell, I've seen benches on air/closed-loop @ 5,2 and boot to windows at 5,4GHz already.
5. Remind me again, what's the price gap between them again? 320$ (maybe less now, IF you can still find one that is, I can't where I live) vs 140$... or am I wrong?
Your whole reasoning is just broken. If this was a 200$+ APU, I might be inclined to abstract the price bit of the equation, but it's not. Not to mention they are made for different markets, sure AMD want's to mainstream-ise (or even ethusiast-ise, LOL) the APUs, but at the moment, they're still in a pretty different market segment than your average CPU.
nice review dave.
i would consider to wait the steamroller and gcn 2.0 in fusion.
If you're on Llano or thinking of building a compact system... or simply on a budget for an all-around system, it still a worthwhile buy. But yeah, Kaveri... GCN, Steamroller... HSA... sounds way better... especially if programmers will take HSA seriously (and they should). I'm eagerly waiting for a HSA version of a ray-tracing graphics engine, should be quite possible to see a 30fps 720p smart ray-tracing game...