Checking what affects my FPS using E30 M3 in the pits at Nurburgring. 5760x1200 on a GTX760 2GB.
AF:
0x 81fps (and looks pretty awful)
2x 79fps
4x 75fps spiking to 60s
8x 76fps spiking to 60s
16x 73fps with smaller spikes
It's strange what makes more or less spikes...
Anyway, starting from there,
very low shadows: 73fps
low shadows: 74fps?
medium shadows: 73fps
high shadows: 70fps
no AA: 85fps
2x AA: 74fps
4x AA: 71fps
8x AA: 57fps
1x FXAA: 76fps
2x FXAA: 73fps <-- this is the one I had with above AF tests.
3x FXAA: 68fps
4x FXAA: 68fps
5x FXAA: 64fps
6x FXAA: 63fps
I should note that at every level, FXAA doesn't look as nice as regular AA on certain objects.
4xAA, 1xFXAA: 63fps - stops some of the crawling effects 4xAA has on its own.
World detail:
minimum 75fps
low 73fps
medium 72fps
high 72fps
very high 71fps
maximum 69fps
To be honest I'm not sure what difference these make, I didn't notice anything changing. May as well leave it at maximum.
Reflections:
Static 69fps
Low, 1 face per frame: 72fps (it's higher than static???)
Low, 6 faces per frame: 65fps
Medium, 1 face per frame: 69fps
Medium, 6 faces per frame: 58fps
High, 1 face per frame: 59fps
High, 2 faces per frame: 54fps
High, 3 faces per frame: 49fps
High, 4 faces per frame: 46fps
High, 6 faces per frame: 40fps
This is one of the settings that actually has an impact on framerate. I have it at medium-1.
Mirror resolution:
None: 71fps
Normal: 71fps
Normal + high quality: 69fps
High: 70fps
High + high quality: 69fps
No reason not to max this one out really.
+ with all combined settings set to maximize fps, I get 106fps.