ZD ENCODER + 1000 USB POLLING RATE?

I've been waiting for these zd encoders for a while, and realized I don't want to fry them the moment I install then.

Will increasing the USB polling rate on these be harmful?

I'm running a P4 3.4, 1512MB Ram, XP SP3, with a 9200se Radeon using svid out to a CRT.