The pump and embedeed fan of the AIO are working fine and can be controlled. So : it's not the fan, it's not the controller. Tried with another AIO controler since i have a spare one, i had to rma another unit for a noise issue and haven't send the previous AIO to Amazon (the pump on the new one is indeed a LOT more silent) Armoury Crate’s pre-set performance modes are all most people will need to get the job done Silent mode lowers power consumption for quiet operation, Performance mode strikes a balance between power and acoustics, and Turbo mode cranks everything to the max for high-octane gaming. I did a system restore of few days ago, same issue. I run the fans on the CPU header, they work fine Uninstall armory crate multiple times with the uninstaller / reinstall it Plug one fan on each header of the controller instead of using the splitter It's litteraly driving me crazy, It was working fine and of course i tried to do it better and now it's all messed up. After a wihile they manage to spin again but now they are detected as maxing at 570 RPM The fans started to act out, not spinning or one or 2 out of 3 It was working fine but yesterday i had to unplug the aio fan controller to do some cable management. I'm having an issue with Armory Crate and controlling my Ryujin Fans.

Armory crate fan control