Go try to shop for a gaming mouse and you'll often have someone try to sell you on based on how many dpi it's rated at, but this is actually one of the most overused, overhyped words in the gaming peripheral industry. 2. But before we get into that, I should probably explain what dpi actually means. Dpi is a misnomer when referring to mouse sensitivity. It stands for dots per inch, meaning the number of dots that can fit in a straight line which is one inch in length on a screen or printed image. 3. The proper name for the measurement of mouse sensitivity is actually CPI or counts per inch. This is the number of counts or virtual pixels that the mouse sensor will be able to display and register on a surface in 1 inch of physical space. 4. Optical sensors have a maximum native resolution or native CPI based on the size constraints of a mouse, usually somewhere between 800 and 1600 CPI. So, in order to raise the CPI beyond that level, manufacturers actually have to split each virtual representation of a pixel into four or more virtual pixels, which is why DPI (technically CPI) measurements given by manufacturers are usually in multiples of 800. 5. Well, you might be saying, higher CPI must always be better. Let's not go that far. Splitting these virtual pixels actually causes some significant issues with sensor accuracy, as having more virtual pixels creates more noise or interference and therefore more errors when reading mouse movements. 6. The main message here is that just because your mouse has any knowledge in CPI does not mean that it's actually able to read more information than a mouse with 800 CPI. CPI is only a measurement of the relationship between...
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