As you can see, aside from the 400 CPI step, deviation is consistently positive and of varying yet mostly significant degree, which is an average result overall. I've restricted my testing to the four most common CPI steps, which are 400, 800, 1600, and 3200. However, please keep in mind that said variance will still differ from unit to unit, so your mileage may vary. In this test, I'm determining whether this is the case or not. It is impossible to always achieve a perfect match, but ideally, nominal and actual CPI should differ as little as possible. There are several factors (firmware, mounting height of the sensor not meeting specifications, mouse feet thickness, mousing surface, among others) which may contribute to nominal CPI not matching actual CPI. Out of the box, five pre-defined CPI steps are available: 400, 800, 1600, 3200, and 6400.Д¬PI Accuracy'CPI' (short for counts per inch) describes the number of counts registered by the mouse if it is moved exactly an inch. According to specifications, the 3359 is capable of up to 8500 CPI, as well as a maximum tracking speed of 300 IPS, which equals 7.62 m/s. The PAW3359 is based on the PAW3339, which was previously used on the Razer Abyssus Essential and Atheris. Sensor and PerformanceThe Razer DeathAdder V2 Mini is equipped with the PAW3359.

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