NKRO refers to N-Crucial Rollover, the ultimate in keyboards. A keyboard with N-Essential Rollover can sign-up as quite a few keys as you can push at once without any important blocking problems. At present, this attribute is barely obtainable in keyboards with PS/2 connectors. PS/two is really a six-pin Mini-DIN http://andrenevla.blogsuperapp.com/7603415/the-best-side-of-mechanical-key-switches