I bought a kraken 240 a few years ago, since it was one of, if not the only 240mm aio cooler available at the time. A genuine gap in the market.

Then I learned that its pump speed is not set by the motherboard, but via usb and a proprietary (and infamously buggy and resource hoggy) windows app. At startup it is set to a default slow pump speed, and will not speed up unless you have their _application bloatware running. On linux youre just fucked.
I will not be buying NZXT again.