現在我們的問題是
　　鼠標使用USB接口和PS/2接口是否有不同？

　　這個問題 我有我的答案
　　但是為了嚴謹起見 也為了正確引導國內cser的技術走向
　　Microsoft技術總部和Logitech技術總部咨詢答復如下：//本文轉自www.49028c.com武林網

　　首先是Microsoft的回答：
　　Thank you for writing back.

　　From your reply, I gather that you would to know if there is any difference in performance when the mouse is plugged to the USB and the PS/2 ports.

　　Let me assure you that in most cases, there would not be a performance difference. In the former, the mouse works as a USB mouse and in the latter the mouse is recognized as a PS/2 mouse.

　　However when the mouse is used on a Laptop, it is recommended that the mouse be plugged to the USB ports. The reason that is that, when the mouse uses the PS/2 port then there might be conflicts with internal pointing devices on the Laptop; as they also use the PS/2 bus for communication.

　　I hope this information helps. Please feel free to write back in case you need additional clarifications on this issue. It will be my pleasure to be of assistance.

Best Regards,

　　Abraham
　　Microsoft Product Support Services

　　然后我拿到了Logitech的回復

　　Thank you for using Logitech's Electronic Technical Support. My name is Rohit. The following information addresses your original question. You may wish to print this out and/or save this on your computer.

　　We would to inform you that if when you plug in your mouse in the USB port the Windows OS will automatically detect the mouse and you can start using it. If you plug in your mouse in a PS2 port the Windows OS will not detect the mouse. For the Windows OS to detect your mouse you will have to restart your computer.
　　The performance of the mouse will be the same whether you use it on a PS2 port or USB port.

　　If you have additional technical questions regarding this issue, please reply to this email.

　　If you have questions regarding another issue with your product, or questions regarding another product, please visit our web site at www.logitech.com and submit your question.

　　Thank you for your interest in Logitech.

　　Regards,
　　Rohit
　　Logitech Customer Support

　　使用USB和PS/2接口來操作鼠標，所實現的效果是基本一致的，如果在USB和PS2接口都擁有的前提下非要二選一，那么 任何時刻我們都應該選擇穩定高效的USB.而和Logi或者Micro的品牌或者型號無關。

　　“關于PS2和USB2.0在CS中的表現深入研究”文章中任舉幾處無法接受的硬傷

　　1.使用同樣的sensitivity同樣的cfg，Logitech USB的,實際轉身范圍只有Microsoft USB的三分之一??！

　　2.問題應該不在MX光電引擎上，也許就出在Microsoft也曾經提到過的USB2.0的最大傳輸瓶徑問題上。

　　3.做“腕動”的時候，移動范圍比較小速度比較慢，掃描到的數據量小，125hz/m的接口傳輸速度足夠把這些數據在短時間內傳輸出去，所以移動速度正常且和Microsoft相近，而在做“臂動”時，掃描范圍增大，移動速度比較快，掃描到的數據量增多。

　　4.鼠標速度感覺很慢不易轉身的時候最大傳輸速率相對較低。

　　5.傳輸速率：PS2maxrate