Some information on other mice and the speed they can handle can be found in ESReality's MouseScore from 2007. However, since I use the wheel mouse optical 1.1a, my sensor will cause me to have neg accel past 1m/s (1.55m/s overclocked). Megapixels DPI 1 Megapixels: 53.46 DPI: 2. This is a table for most common megapixels to dpi conversion results at 4:3 aspect ratio and 27 inches diagonal. To convert megapixels to dpi online, you can use the above converter for fast and accurate conversion. For example, my neg accel value calculated from above is 2.54m/s. Finally, calculate the dpi value: DPI Diagonal In Pixels/Diagonal In Inches. The sensor in your mouse can also effect whether or not you get neg accel past a certain speed. Games that use mouse pointer input are not the only cause of negative acceleration. The fact is, you shouldn’t and don’t want to print everything at 300dpi. If your fpsdrops below the value you have in the settings section, your maximum speed before reaching negative acceleration will also decrease, which makes it easier to reach the point of negative acceleration. In essence, if you change your DPI then you will need to change your in-game sensitivity. If possible, lower your dpi or raise your resolution and see what that does for your new max speed calculation.
If you find yourself moving your mouse faster than the speed above and getting negative acceleration, make sure to look at what elements of the equation could be causing this issue. In order to tell if your game does this, you need to know what type of input your game uses. This only will occur in games that use mouse pointer input (WM_MOUSEMOVE/GetCursorPos).
If you move your mouse faster than the above speed you will get negative acceleration.