What to run refresh rate at on 21" NEC Multisync P1150?

[Metalloid]

I just bought my new monitor. It can go up to 160hz in 640*480, like 140hz in 800*600, and I can do 100hz in 1024*768. My question is, do I set refresh rate to optimal, or run at the monitor's max? In games, will running at a set refresh rate keep me from playing, and will there be any performance increases? Thanks

 

[AaronP]

will there be any performance increases

not frame rate wise, but a higher refresh rate will be a lot easier on your eyes. For me, 85hz is the minimum, and the sweet spot is between 85-100, higher if your monitor can handle it.

 

[Metalloid]

So do I run it at optimal or the highest my monitor can handle?