Logitech's G502 gaming mouse tracks movement with a 12,000-DPI sensor
 

Logitech has introduced a new wired mouse for gamers. The G502 Proteus Core has all the trappings of a modern gaming rodent, including a fancy sensor. According to Logitech, the Proteus Core's new Delta Zero IR sensor is capable of tracking movement at up to 12,000 DPI. The sensitivity is adjustable on the fly, of course, and a separate tuning mechanism can optimize the sensor for different kinds of surfaces, such as hard desks or soft pads.

http://techreport.com/news/26291/log...000-dpi-sensor