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cpu fan cooling

Discussion in 'General Hardware' started by robwigan, Apr 27, 2019.

  1. robwigan


    Joined: Aug 29, 2012

    Posts: 154

    if i hypothetically put my cooling fan on incorrectly e.g both extracting air and one side NOT sucking in air.

    how soon would the CPU run before shutting down ? if in a cpu heavy game title would this rear its head straight away or is it something that wouldn't affect it for quite some time ?

    CPU is i5 5670k no oc
    phantek tc12dx
    Last edited: Apr 27, 2019
  2. MartinPrince


    Joined: Aug 14, 2018

    Posts: 564

    Do you have 1 fan or 2 fans on the heatsink as you used the singular 'fan' then used the word 'both'. It depends on what CPU you have and how hot it actually gets. More info needed, like CPU, Heatsink etc.
  3. EsaT


    Joined: Jun 6, 2008

    Posts: 5,655

    Location: Finland

    As long as there's heatsink attached, CPU won't get completely paralyzed.
    And as long as there's airflow through heatsink to any direction it will cool pretty much normally.
  4. StarShock

    Wise Guy

    Joined: Nov 6, 2005

    Posts: 1,330

    assuming you mean a cooler similar to this, With the fan blowing in opposite directions :


    It wouldn't be very efficient and likely would throttle under high usage, but you'd probably still get enough cooling out of it to keep working. The heat sink will still be moving heat away from the CPU die and there would still be some air flow over the fins.

    Wouldn't be good, but wouldn't just shut down either :p
  5. robwigan


    Joined: Aug 29, 2012

    Posts: 154

    fans plural

    one is supposed to intake one exhale however when I built in the new case I have a feeling I set them up wrong and it feels that way also
    Last edited: Apr 27, 2019
  6. Cooler running


    Joined: Mar 28, 2019

    Posts: 156

    Air flow is a weird one, one of the good things about positive pressure case-fan setups do sort of help solve this.

    As long as it's not blowing onto the GPU or something isn't blowing on to it, (unless your case is literally a closed off oven) then I'll be ok.

    You can check the airflow as usually there is a little arrow on the side of the fan which shows which way it blows.

    It'll throttle. Note fans aren't a necessity, on my 45watt cpus they don't even come with a fan. In your case you'll just get lower performance.
    Last edited: Apr 28, 2019
  7. freddie64

    Wise Guy

    Joined: Mar 22, 2008

    Posts: 2,462

    Last edited: Apr 28, 2019
  8. robwigan


    Joined: Aug 29, 2012

    Posts: 154

    they do have the arrows on so I was able to check. should have looked in the first place but it wasnt right how I had it, my fan at the back of the cooler was the one drawing in air and the fan at the front pulled it through. switched them round now