I'd imagine that at minuscule amount of work keyboard needs to do speed of CPU barely matters. As long as chip has USB builtin (and you're not manually bit-ban

I'd imagine that at minuscule amount of work keyboard needs to do speed of CPU barely matters. As long as chip has USB builtin (and you're not manually bit-banging usb 1.1 out) it's essentially "fill a buffer, send it to USB controller". Now if it has to control keyboard and blink a billion of RGB leds, sure, that helps