I personally have this keyboard myself, MK780 red LED with MX red switches, and would like to mention a few things that were not mentioned in the article or possibly mentioned wrongly.
As for the N-Key roll over switch on the back of the keyboard and the software. In the software you are not able to select what the N-key rollover is set to but it does display the current position it is set to. I urge you, Scolaner, to try this and find out for yourself.
The Volume LED indicator doesn't seem to rise with the volume IF the volume is adjusted by Windows or a program that can control the volume, Creative control console as an example. It only registers if the volume wheel is physically moved. Did you notice these anomalies while testing?
EDIT: After a bunch of testing and a reset of the OS It was found that in order for the volume LED indicator to work properly the G.Skill software must be run at startup. IF it is not running then the LED does not register the volume change if it is changed from inside the OS. The N-Key rollover selection as mentioned earlier still stands. The reason for this is it is a manual switch and has no motorized mechanisms to flip the switch when a different selection is made inside the software. The way the following is written it says you can adjust teh N-Key rollover from within the software which is not the case.
Under the Setting tab, you can adjust the polling rate to 125Hz, 250Hz, 500Hz, or 1,000Hz; toggle between NKRO or 6KRO; and create sleep and timer settings (for which you can add a lighting effect, because why not).