Boot with USB keyboard

[westie17]

I noticed in my bios that I have an option to boot the computer with the space bar with a PS/2 Keyboard, I currently have a USB keyboard, is that possible to do this with USB?

If not I have a USB to PS/2 adapter, what is the difference between USB and PS/2 performance wise?

 

[westie17]

I heard that with USB you can use press more keys at once or something, it registers more key strokes, something like that.