Noctua NF-140
Noctua NF-140
Hello everyone, welcome! I just bought and set up a Noctua NF-140 exhaust fan after replacing my Corsair 3-pin model. While doing this, I wanted to compare the noise levels between the two. Using MSI Command Center, I increased the exhaust fan from 50% to 100%, and wow—my chair felt cooler! I then turned up both radiator fans to maximum. The two Noctua fans worked perfectly, while the others were controlled by a fan speed controller. After about a minute, all three fans reached full speed and shut down. Since my other fans weren’t connected directly to the motherboard, I’m wondering if there’s a voltage issue or another reason for the difference. Could you help me figure this out? Thanks! P.S. Your YouTube channel Linus is awesome!
The motherboard seems to misinterpret PWM and DC signals consistently. It appears detection isn't reliable, so it defaults to whatever setting is predefined. The shutdown after a minute suggests it doesn’t recognize the issue properly, even though speed control functions normally. It’s possible that fans aren’t receiving full power due to improper headers, which is common with pumps instead of fans. Splitters are frequently used for this reason. I’d need to know the exact model to provide a detailed breakdown of each fan header and connected components.
Thanks for the feedback! This motherboard is a MSI 990FXA gaming model. I shut it down briefly and came back after about 20 minutes to check again. All three fans were running at full speed and the problem didn’t return. Haha, I was thinking maybe I should just restart it and try once more—maybe something in the BIOS caused it? Otherwise, this seems resolved for now. Hope others see this and give it a shot too!
CPU_Fan -AIO pump
Sys_Fan 1 exhuast fan (Noctua) 4pin
Sys_Fan 2 Rad fans 2 intake fans in front controlled by aftermarket single LCD screen fan controller
Bottom fan also managed by the same controller.