ZOWIE EC and AM doesn't have onboard memory but you can change the Hz (125, 500, 100) and DPI (AM/EC eVo 450, 1150, 2300 old EC 500, 1000, 2000) in mouse without drivers. Also in Logitech G400 you can swap 400, 800, 1800 and 3600 DPI without any drivers and default Hz is 1000.