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6KRO/NKRO testing and Initial Impressions
Since I type a lot, I did not feel any difference in polling rate, even while gaming. Few companies have started emphasizing on 1000Hz/1ms polling rate. while its known to make a difference in a gaming mouse, I didn’t find anything special in having polling rates as an option. Its also well known that higher polling rates use more CPU time. Also, in USB mode typically you can use up to 6KRO. Its only in the PS/2 pin. I am partially disappointed that motherboard manufacturers in certain higher end boards – especially gaming motherboard manufacturers- are ditching the PS/2 pin, even the keyboard/mouse PS/2 pin connector. Even if one says that CPU usage is “minor”, PS/2 pin has the advantage of NKRO- and there’s no polling rate via PS/2 pin. You do lose a USB port, but on the bright side, USB lets you install the keyboard/hot-swap. PS/2, unfortunately, requires you to restart if you’re switching between keyboards.
SteelSeries, another company that makes gaming hardware, says so clearly in their 6G V2’s product page:
“We absolutely recommend using the PS/2 connector when possible. First, it will give you total freedom with no limit to the amount of simultaneous key presses. And, equally as important, using the PS/2 may just improve your overall gaming experience. The reason is that when you use a USB keyboard your computer is actually using CPU time polling your keyboard. The higher the polling rate the more CPU time is used to perform the polling. And because of the built-in debounce rate found on any quality keyboard, any polling rate above 200Hz is simply a waste of CPU time and really just a result of pointless marketing hype. Unlike USB keyboards a PS/2 keyboard isn’t polled at all. The keyboard simply sends a signal to the computer as key presses are made, which causes a hardware interrupt, forcing the CPU to register the signal.”
But going by the article above and after reading few guides that you find while Quick Pro doesn’t come with a USB-to-PS/2 adapter- so does Full NKRO REALLY work in USB mode after enabling it?
The following screenshots are taken at 4MS polling rate and with NKRO enabled:
NKRO does work in USB mode. Not that I’ve doubted from Coolermaster, and I was told being told that there’s probably one more mechanical keyboard that does the same, but this is the first time I am seeing a mechanical keyboard with Full NKRO support via USB. I’ve asked Coolermaster the usual “How did you do that?” question. I didn’t get a reply yet, but I’ll post the update here.
Since the 6+ keystrokes are getting registered at the same time, it shouldn’t be a surprise that some of the most common keystroke combos pass with flying colours:
Edit: Coolermaster said that Quick Fire Pro is able to support NKRO in USB mode because we did this via the Firmware.
Even after restarts and shutdowns, the board does remember the previous Key Rollover.