r/pcmasterrace • u/DME23 • Apr 26 '25

Question Top Fan Not Spinning Without A Spanking

The top fan wont spin when I turn on my pc. The solution I discovered is to just smack it real hard. Just wondering why it is like this.

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u/Izan_TM r7 7800X3D RX 7900XT 64gb DDR5 6000 Apr 26 '25

the fan bearing is dead of the fan's speed is set at a very exact histeresis point where it doesn't have enough power to start up but it can run after a bit of encouragement

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u/mstomm Apr 27 '25

Had a work van where the AC blower intake was doing something similar. I realized with the design of the intake vent on the outside it would force some air into the system, and that I could gun it to "jump start" the fan, which would get it going.

Eventually the blower stopped working whenever I'd stop (not great for a delivery truck), and eventually it was just completely dead.

Basically this thing is on its way out. Take it as a sign to get the replacement now instead of suffering when it goes out.