Eh? Are you asking what the lowest possible settings are in configuration utility?
If so: All but one should be self explanatory.
The only confusing one is Buffer size. The lowest would be 'Quarter' and highest would be 'Double'. I hope that gives you understanding enough to compare the other choices for that setting. I myself wouldn't recommend changing it from 'resolution' unless you are struggling for FPS as it can make the graphics look like a Playstation game.
I don't mean to sound
rude, but I can't help the way people interpret my words.