PS2 Vs. USB 2.0

[CamHot]

Which of the two between the PS2 port and USB 2.0 has a higher sampling rate for mice? I've heard PS2 has a refresh rate of 200hz while USB 2.0 refreshes at 160hz. Thanks.

[Black Hawk]

Are you really gonna notice the diffrence?

[qparadox]

PS/2 can refresh up to 200 Hz, USB mice will refresh up to 125 Hz. The computer -> mouse link isn't as important as the internal mouse workings as there's no need to sample higher when only so many frames are drawn on the monitor. The calculations for movement between actual samples of the optical sensor are done ONBOARD the mouse and thus the latencies involved in the interface probably play a bigger factor than the pure refresh rate. I've always found the same mice to be quicker on USB likely due to either controller latencies or the USB->PS/2 converter latency (if there is any).