I ran two short identical scene to test with
first run:
GTX 680 SLI both card in 1241 Mhz core clock, stock Memory clock
second run:
GTX 680 SLI both card in 1359 Mhz core clock, +300Mhz Memory clock
In video you can see, their min fps are about the same, the GPU usage at the low fps scenes are also at quite low usage (70-80%)
So, overclock your graphic card couldn't improve your min fps area, where it should be.
At other games I played, sometimes the FPS dropped when GPU usage at 99%, I think this is normal. I call this optimized, The fps drop simply because my GPU is not fast enough. It bottleneck the process. Not the game's fault.
But in Crysis 3, the GPU still has like 25%+ headroom and the game itself decide to drop fps for no obvious reason, I'd say this game is not optimized.
I know Crysis 3 just released few days but I still want to report this and hope Crytek will work on this issue in upcoming patch. Thanks!
Screenshot:
At you can see, they both have same FPS
at 1241Mhz, the GPU1 and 2 usage are 87% and 89%
at 1359Mhz, the GPU1 and 2 usage are 84% and 70%
So what does that tell us? The GPU is faster @1359Mhz but the game choose to use less GPU power(about the same scale as@1241Mhz) instead of utilize the extra headroom for more fps.
Weird.
@1241Mhz
@1359Mhz