What is NKRO?
NKRO refers to N-key rollover. A keyboard with N-key rollover can register as many keys as you can press at once without "dropping" any characters. This means that no matter how fast you type or game, a NKRO enabled keyboard will keep up.
Many low end keyboards can only register up to 6 key presses at a time. Most Das Keyboard are NKRO enabled.