Originally Posted by That Guy;14454011
Question: Does it use PS/2 or USB and what is the KRO?
it does bothhttp://www.wasdkeyboards.com/index.php/products/custom-keyboards-1.html
Copied from the Mechanical Keyboard guidehttp://www.overclock.net/keyboards/491752-mechanical-keyboard-guide.html
Key Rollover (#KRO & NKRO)
NKRO is when you can press as many keys as you want at the same time, and all of them go through. This is similar to what some 'gaming keyboards' incorrectly market as "anti-ghosting", even though Logitech and Razer only apply it to the WASD cluster. Note that right now only PS/2 keyboards can exhibit full n-key rollover; though Microsoft and Ducky are just two companies who have already looked at designing NKRO over USB.
#KRO, where # = Any Number, is the key roll over of your board; and stands for the maximum number of keys you can press without experiencing any key blocking.
Many USB mechanical Keyboards are labeled as 6KRO, meaning any 6 keys can be pressed at once without the user experiencing blocking. This is generally enough for most users. Though a limited number of games may have a problem with 6KRO.
USB keyboards with 6KRO also allow for a maximum of 4 modifier keys to be used with those 6 normal keys. These modifiers include CTRL, ALT, Shift, & Super (Windows, Command, or Meta Key.)
Sometimes this also includes the FN key present on select keyboards.