How to check mouse polling rate while in-game

does it really matter?

typically you wont change the mouse polling rate ever... normally you just swap dpi.

i'd just leave the polling at default (to whatever the software / drivers are set to) or have it set to whatever you want it to be and leave it alone.
 
i got the Logitech G700s and the window 8.1 pro, there is a problem in window 8.1 causing mouse polling rate only run at and under 200hz.
And microsoft had release a fix for that, i just want to check if the fix really work.