Since the new board only has a PS2 combo port, this small compact chosen. The Rezis the other offered here were not promising, here there was no negative Rezi, therefore this choice. I do not quite, so everything is compact on the computer. Since I work on a KVM had to be maintained, the PS2 connection. The adapter was recognized immediately and if both were so connected mouse and keyboard because it worked - but if only the mouse without keyboard hangs, it will not recognize the mouse. Only the keyboard off going. Unfortunately, the BIOS detects the wakeup keyboard keypress only on PS2 port ... still ne solution found. It does but first what it is :)