When choosing a gaming mouse there are two issues that must be understood: polling rate and DPI level.
A mouse’s polling rate specifies how often it reports its position to the computer. For example, a 200Hz polling rate means the mouse reports its position to the computer 200 times per second. A high polling rate reduces the time between when you move your mouse and when the pointer moves on the screen. A polling rate above 500Hz isn’t necessary and only puts unnecessary strain on your computer’s processor. If your mouse is wireless, a higher polling rate can mean better performance but at the cost of shorter battery life.
DPI stands for Dots Per Inch. A mouse’s DPI level determines how far the mouse pointer moves for each millimetre that you move your mouse; the higher the DPI level, the further the mouse pointer moves. The DPI level that works best can vary from game to game. High DPI levels are needed more often with FPS games than other game genres.
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