I finally replaced the cpu and case fan on the T130 with noctua fans because I couldn’t bear the racket anymore– I can’t remember if the stock fans just wouldn’t spin slower or were just loud– and I have to say I’m an instant fan– no pun intended. The box is finally quiet. It only took ~6 years. Speaking of which, those stock fans were… dirty.

I had to increase the minimum pwm from 5% to 25%, or else iDRAC would warn that the fan rpm is too low.

This post is to point out that the noctua voltage reducing cable (“low noise adapter”) is unnecessary, unless the fans are stuck at high rpm for whatever reason (eg non-pwm fans). I had installed them first, so I had to then remove them and turn all the fans around, which was annoying and a little painful– those rubber case fan plugs are so hard to reattach.