I have just built my first home server; after the first boot, the PSU fan runs at full speed. I couldn’t figure out what the issue was. Any suggestions would be appreciated.
Link to Reddit sadly, but more people seem to have "this issue". If you also have a GPU in there, you might just be taking too much from the PSU to idle.
An exact PSU model would help tremendously, afaik only high end ones have variable fan speed, for example my cheap Thermaltake's fans spin at constant rate