hatte dein prob auch, aber erst nach einem Jahr, nun wieder alles TOP
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MS Intelli 1.1
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I wanted to track down why this mouse hits a top speed. Some simple calculations highlight the most likely factor. The USB port is polled at 125 Hz by Windows XP. If the mouse has an 8 bit buffer, then it will be reporting values from -127 to 127 on each axis each time the PC fetches a result. Therefore the highest possible value of counts per second should be 127 * 125 = 15875. This is indeed the highest value that I measured on my graph. I would conclude that the 8-bit buffer of the Microsoft mouse is the cause of this maximum speed, and the perceived negative acceleration it creates.
Since the two factors that make up the maximum speed are the buffer size and the frequency of the USB port polling, I wondered if I can improve the Microsoft WMO performance by overclocking the USB port. I set the frequency to 1000 Hz and recorded the new graph below.
MS Wheel Mouse Optical (1000 Hz) Response Graph
As you can see, the maximum speed problem disappears once you overclock the USB port and you can see new characteristics of the mouse. Perfect Control now goes up to 1.55 m/s (60"/s). Beyond that there is a strange area of very negative acceleration, but the Malfunction Speed remains at 2.10 m/s (83"/s).
Overclocking the Microsoft Wheel Mouse Optical improves the sensor performance. You also get the added benefit of reduced latency from 8ms at 125 Hz to just 1ms at 1000 Hz. Note that you only need to clock the USB port to 250 Hz polling to eliminate the buffer problem, but this mouse had no problem running at 1000 Hz.
danke für den link
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