After some more testing, I am really liking the improvement in performance over my 580 Classified.
I retested Witcher 2 in Uber Mode and for the most part my FPS has gotten a bit better. I am now getting 50-60fps, with only occasional dips into 40's, but that has been primarily in intense scenes...for example, when you are at the start of the game and you leave the tent with Trish, you are on top of a small till, with anywhere from 20-30 troops walking around, flags flying in the air, to the left tree swaying in the wind, catapults launching stuff..I mean very intense it drops to around 42 or so. Most of the time when fighting enemies etc, I am usually right around 60fps.
I did boost the GPU offset by +100 and for me in SLI that is the best I can do. At 110+ while testing I do crash. Like all reference cards, you miles may vary as a user over in the eVGA forums has the same cards in SLI like I do and he is about to easily get a 125+ on his core in SLI. Cards do vary and it is the luck of the draw..some cards will "boost" a bit higher as well.
Another example, is this same user running Unigine at all default GPU settings he gets a score of 91fps. For me I get around 83fps. I can achieve 92.5 with a +100 offset and memory at 400mhz+...so I get 1.5 fps versus his stock cards. So, it seems one of my GPU's is not a very good clocker/booster, but it still runs within spec...so I really cant complain. Until "binned" GPU's are available as custom releases, this is what can and does happen with reference cards.
At the end of the day however, I am extremly pleased. In Metro2033 Benchmark, in DX11 and everything set to the highest level on my 580 SLI Classy's I average 58.2 FPS through 3 runs. With the 680's I get 78.8fps in the same test.
