Long time fan of techspot here, but the CPU benchmarks are a really BAD measure of the game. In large battles, which happen all the time in this game, nothing AMD has can run the game smoothly, diablo appears to require at least a decent sandy bridge to maintain 60 fps in large fights. It appears to be because of the physics.
I guarantee if you guys were to look at the minimum fps in large fights with different CPUs you would see an AMD, even overclocked is will have dramatic fps drops when things start flying in large battles. A easy way to test is the part where the templar breaks the barrier before and after jondar, amd processors drop down as far as 20 fps and the ivy bridge processors ive tested with it dont even drop fps.
Not sure if its CPU or GPU? Here this, I ran my brother's new gtx 670 with an unlocked and overclocked amd 960t cpu and it still lagged the same as with my 6950. He used my 6950 and maintained a smooth 60 fps with his 3770k intel ivy bridge. Clearly AMD processors either need more optimization from blizzard or they cannot handle the physics diablo requires. Its also noticeable to the eyes, with both computers next to eachother its easy to tell which one has the AMD and which one has the new intel because of the huge drop in fps.