AngryAceI only have a 120 AIO for a ITX build. On that motherboard, if I don't manually set the cpu fan mode to PWM, the fan would do all kinds of weird stuff from not working at all, surging or 100% RPM. Shot in the dark since you have a 360 but you can check that and see it does anything
HoggleThe new fans should help fix the issue since they will run at a lower RPM and be quieter. Would be interesting to see which fan has the higher CFM rating but Noctuas fans are a great choice.