The Corsair Nightsword has a very wide CPI range, which you can fine-tune very precisely to suit your preferred sensitivity. Unfortunately, the mouse is extremely inconsistent with our ‘CPI Error’ test. There’s a lot of over and undershooting, which averages to a great CPI error, giving it a better score than what it should. On the upside, the polling rate can be adjusted between 125-250-500-1000Hz and you can adjust both the X and Y axis sensitivity.