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Thread: Fans RPM slows down when PC is under load?

  1. #1
    Join Date
    Mar 2013

    Default Fans RPM slows down when PC is under load?

    Hi all,

    When I run a stress test or even surf the Internet, when my PC is under load my case fans RPM drops and so does the PSU fan?

    I know my processor sits at 1.6Ghz and then goes to 3.8Ghz on demand but should both my case fans and PSU fans slow down? It's only slightly but enough to take notice of and actually hear them,

    Thanks all

  2. #2
    Rale is offline Junior Member
    Join Date
    Dec 2012

    Default Re: Fans RPM slows down when PC is under load?

    z77x-ud3h System Fans Query

    PSU fan speed depends on the temperature inside unit. Implementation depends on the manufacturer: from simple thermistor, thermal sensor and controller to additional pcb.

    High PC load -> more load on PSU -> the higher the temperature -> faster fan spins.

  3. #3
    Join Date
    Aug 2009
    Birmingham,Great Britain

    Default Re: Fans RPM slows down when PC is under load?

    what size psu are you using?
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/[email protected] 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
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    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
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