While you might not need the RGB controller if you're using all-Razer components in your PC build, you might want to include this little black box. Due to the extra care that Razer is taking with the manufacturing of the Katana, it won't be available until early 2022. The Katana, of course, has an aRGB zero-RPM fan that's Chroma-enabled. After all, there's nothing worse than your power supply blowing a transistor and taking the rest of the PC with it. They've really spent extra time on the Katana, making sure every component is premium so that it delivers efficient, clean, consistent power.
The Razer Katana is a fully modular beast, with a variety of sizes from 750 to 1,200 watts (Platinum rated) and a Titanium-rated 1,600 watt behemoth. Power supplies are the lifeblood of your PC build.