Some case fans fail to rotate properly.
Some case fans fail to rotate properly.
I recently finished my new build and noticed issues with the case fans. The mini pop air unit has a fractal design, and you can view the rest of the project here: https://ca.pcpartpicker.com/list/PXhmQP. Initially, everything seemed to operate correctly. However, after some time, two out of three fans stopped spinning. I checked by separating them to confirm they were still connected, but found no obvious faults. When I touched one fan, it began spinning again. After turning it on, the front two fans didn’t start, but they eventually worked. It appears they have power, yet sometimes fail to spin consistently. The speed seems low—around 300 RPM in the BIOS, which might be normal. Anyone know what might be causing this?
Adjust the fan curve in BIOS. Likely set too low to start three fans from one header.
This suggestion works well for my fractal setup. The fan software needed adjustments to the curve so the fans would start rotating properly. Initially, the board wasn’t delivering enough power for a full spin-up. There’s no dedicated spin monitor—only the measured output is visible. I also fine-tuned the fan’s start-up and pause times, setting them around 2 minutes each. This helps eliminate the rapid acceleration and deceleration sounds that were bothersome. In fact, a quick 10-second spin-up isn’t effective at cooling, but a full minute of rotation does move air and improve performance.
They connect to one motherboard header. Immediately after sharing this, I checked the BIOS and adjusted all fan settings to normal. I’m hoping this resolves the issue.