this post was submitted on 19 Jul 2023
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10W is pretty much nothing, most likely just the consumption of the fan. Sounds like that the temps increase, which then starts spinning the fans, which decreases the temps, and stops the fans. If this is annoying to you, change the temperature curves to slowly spin on idle, so that air flows even on idle.
Edit: didn't realize that numbers are other way around, maybe the other fans cause the airflow when small load is on the system, and this increases the consumption, and adds little bit airflow. Would explain both
Only cpu fan is spinning and case fans are off. I can tell how much power it use just by looking at PSU fan.
Btw, is it possible to adjust fan curve on PSU? That might be a solution.
Im not worried about 10W and I also dont mind if fan would run constantly since its still silent, but feels like something is wrong and its still under warranty. Why would 550W PSU with 0 RPM mode overheat at 30W and start the fan. They dont provide fan speed curve, only fan noise curve, but still I believe that 0RPM should be up to 220W. And true that they dont even provide efficiency below 10% which is way above the power on idle.
To My knowledge you cannot control the PSU fan curve, it is most likely controlled by the output power, or heat. Fan spinning itself is not indication of overheating, it is part of normal operation.
If your case fans are off, it might be that temp inside the case is increasing slowly, and the psu fan is the first to trigger. Case fans in my opinion should be always on in idle to provide base fresh airflow. I would change their curves first and see does this remove the psu fan cycle.
I forgot to add specs, intel 3930, 2 sata SSDs, 8 GB ram and no gpu. CPU is at 1% and <40°C