SYS_FAN splitters support PWM, but only for one fan in the split chain. The remaining fans will run in DC mode and have an identical speed to the fan controlled by PWM.u003cbr/u003eu003cbr/u003eu003ca href=u0022https://edgeup.asus.com/2021/z590-motherboard-guide-asus-rog-maximus-xiii-rog-strix-tuf-gaming-prime/#:~:text=enhance%20your%20experience.-,Hail%20HydraNode,-Even%20the%20bestu0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003eASUS' HydraNodeu003c/au003e is the only fan splitter technology that lets you independently control fans in a splitter using PWM but is only supported on a few ASUS motherboards and fans.