How many fans in iMac 5k?

Discussion in 'iMac' started by Mikegs, Apr 5, 2015.

  1. Mikegs macrumors regular

    Aug 6, 2010
    How many fans are in the iMac 5k?
    Does the graphic card have a fan?

    Lowest speed of the main fan is 1200 RPM. Can it be lowered further by third party software?

  2. redheeler macrumors 604


    Oct 17, 2014
    One fan. No it can't be lowered any further than the idle speed due to overheating protection built into the OS.
  3. andy9l macrumors 68000

    Aug 31, 2009
    England, UK
    One fan in iMacs since 2012 @1,200rpm minimum. No, the mGPU does not have a fan.

    In the 5K iMac:
    GPU under load = 2,300rpm max.
    CPU + GPU under load = 2,700rpm max.

    Whilst 2,700rpm is extremely loud, 1,200rpm is near silent. I would say there's no need to lower further.

    The 5K iMac fan noise is about twice as loud as the 2013 iMac when under load.
  4. Mikegs thread starter macrumors regular

    Aug 6, 2010
    Thank for the information. I have sensitive ears (OCD maybe...), so I think 1000 RPM would be more optimal during light use
  5. Significant1 macrumors 6502

    Dec 20, 2014
    Are you sure, you don't mistake mechanical hard-drive noise as fan noise?
    (don't have a 5K iMac)
  6. Mikegs thread starter macrumors regular

    Aug 6, 2010
  7. Nismo73 macrumors 6502a

    Jan 4, 2013
    I hear it in a silent room. Maybe in the future they would be able to have it run at idle at 1000rpm to lower the idle db number.
  8. cynics macrumors G4

    Jan 8, 2012
    I can easily hear the fan @ idle over Apples current WD 7200 rpm HDD offering. Reason I know is aside from knowing the sound of a HDD is because of replacing HDD's with SSD's.

    That said I still consider the fan @ 1200 RPM virtually silent.

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