The PixArt PMW3320 is an entry-level optical gaming mouse sensor designed for reliable, accurate tracking in budget and mid-range mice. It delivers up to 3,500 CPI (DPI) resolution with configurable sensitivity steps, and tracks motion at up to ~80 IPS (inches per second) with around 20 g acceleration, making it suitable for everyday use and casual gaming. The PMW3320 supports standard 1000 Hz polling rates and provides smooth optical tracking, though it’s not as advanced as higher-end gaming sensors found in premium mice.