The M55 RGB Pro is loaded with a PAW3327 optical sensor that has been developed in conjunction with Pixart, so should deliver high performance & high accuracy tracking.
You do software updates to get the most from favourite programs right? Updating a motherboard BIOS can in a timely manner is also critical. The guide to Flashing a Motherboard BIOS spells out the often complicated steps in plain english. PCSTATS Tips