Member Avatar for badkiller

My CPU fan is running really slow so my CPU temp is 65 degress and if playing a game almost 80 ive cleared dust from it but its still not going faster please can u help

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  • Latest Post Latest Post by jbennet

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This thread already has sensible starting ideas from , , and . Below is a compact, practical troubleshooting sequence that isolates whether the problem is the fan itself, the motherboard fan control, the cooler mounting/TIM, or airflow — and what to do next.

  • With the PC powered off and unplugged, check the fan mechanically: hold the hub and try to spin the blades by hand to feel for roughness or binding. If the blades wobble or the spin feels gritty, the motor/bearings are likely failing.
  • Swap the fan connector: attach the CPU fan to a known-good case fan header or run it from a 12V Molex adapter (power off, then connect). If it runs normal from straight 12V, the board’s fan control is limiting it — check BIOS/UEFI fan settings (disable automatic throttling for a test) or update the board firmware. If it stays slow on direct 12V, replace the fan.
  • If the fan appears to run normally but temperatures remain high, remove the cooler, clean the old thermal interface with 90%+ isopropyl alcohol, reapply a small, even amount of a modern CPU thermal compound, and remount the heatsink with even pressure. Verify the cooler is seated and not tilted.

Also verify case airflow direction and that intake/exhaust are not blocked. Use BIOS readings and a monitoring tool to compare fan RPM and core temperatures before and after each change. When replacing a fan or cooler, choose the correct frame size, the right connector type (3-pin vs 4-pin PWM), and a reliable bearing type for longevity. Take ESD precautions, power the system down before any connector swaps, and if any step is unfamiliar, have a technician or experienced friend assist.

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Member Avatar for dcc

2500 should be fast enough. Are you running any other case fans? Have you tried reapplying thermal compound?

Member Avatar for badkiller

2500 should be fast enough. Are you running any other case fans? Have you tried reapplying thermal compound?

I only have 2 fans one in the power supply and the one ont cpu, when i go into easy tune 5 it has a warning on my cpu and my fan. Im not sure what a thermal cpmpound is i dont know much about computers i just like to play them :P

Member Avatar for dcc

The thermal compound is a paste that is used between the mating surfaces of the CPU and the heatsink assembly to enhance thermal convection.

Is the fan spinning freely? Does it run any cooler with the case open? If it does run cooler with it open you might want to add a fan to the front of the case to draw air in, and a second on to the rear of the case to exhaust the air.

Is the heatsink fan assembly firmly mounted, no movement?

Have you overclocked this computer?

Member Avatar for raybay

That is fast enough for most cooling. But a replacement fan is so inexpensive... $12 to $20, that you can easily replace it. The combo units with heat sink designed for your particular CPU are much better for just a few dollars more. Get a name brand: Cooler Master or better designed for gaming.

If your temp is 65 centigrade, you don't want to run any hotter...

I would add a couple of case fans, also very low priced... one on the front... one on the back... to keep the air moving... and be sure you keep the heatsink and the fan in the power supply blown out with a difluoroethane gas such as Dust Off or equivalent. Do not use compressed air or a vacuum cleaner.

Member Avatar for jbennet

if your tot too sure about fans those Exhausts that fit into the PCI slots are good there like £10 as well

Member Avatar for dcc

... and be sure you keep the heatsink and the fan in the power supply blown out with a difluoroethane gas such as Dust Off or equivalent. Do not use compressed air or a vacuum cleaner.

Are you aware that difluoroethane gas is flammable, it can also cause asphyxiation in a confined area.:eek:

Btw...Dust Off is compressed air, and a vacuum can be safely used for cleaning electronics. :cheesy:

Member Avatar for jbennet

yeah i vacuum my motherbiard and it works fine

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