Posted November 23, 2019 Hi all, Has anyone encountered the same scenario as mine? 140mm case fan starts spinning upon boot then stops after a few seconds. - QFAN control set at 100% - All fan headers are PWM, rated at 12v max 1A each. Both fans (up and down) are connected via splitter, previously worked as intended (full speed) but I noticed this behavior only after a few days. Already tried the following: X swapped the splitter locations X connected the fan alone via splitter X connected the fan directly to the mobo fan header X connected the fan to another fan header X set fan speed to 100% via Argus Monitor ? Tried optimizing all fans via the BIOS control, once the bios reaches this particular fan, it starts spinning for the "test" but then stops again after the optimization ? Once got stuck on a startup error, the fan spun continuously until I reached the loading screen Noctua NF-A14 Chromaxx fan, ASUS TUF X570 Wifi Mobo, 700W PSU, all other fans are spinning as intended. Only this particular fan behaves like this. Case Fan.mp4 Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted November 23, 2019 Noctua fans can stop even if controlled via PWM, the lowest setting depend on a model and on a particular fan. Does it stop if connected to a 3-pin connector (DC-control)? Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted November 23, 2019 Author 34 minutes ago, 1van said: Noctua fans can stop even if controlled via PWM, the lowest setting depend on a model and on a particular fan. Does it stop if connected to a 3-pin connector (DC-control)? Mobo doesn't have any 3-pin fan header, MOBO has settings that can change 4-pin pwm to DC but it doesn't help. What's weirder is top and bottom fans are the same model. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted November 23, 2019 1 hour ago, emcatbagan said: If you really think you'd tried everything and it didn't help, contact Noctua's support, they will help. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted November 24, 2019 Author 6 hours ago, 1van said: If you really think you'd tried everything and it didn't help, contact Noctua's support, they will help. Thanks! Appreciate the advice. Already sent them a ticket while waiting for any leads. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
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