gaming keyboard test?

I have read that some keyboards handle multitple simultaneous keypresses better
than others, such as in games (crouching while moving right while changing
weapons etc which could involve holding 2-3 keys and pressing another)

I really like older keyboards without the windows keys, but don't want to run
into a problem since I am a gamer.

Is there a utility or test out there to determine a keyboard's ability to handle
this?