Please report all spam threads, posts and suspicious members. We receive spam notifications and will take immediate action!
Results 1 to 2 of 2

Thread: Gigabyte Fan Headers

  1. #1
    Join Date
    Nov 2012
    United States

    Question Gigabyte Fan Headers


    I have a new GA-A75-UD4H Gigabyte motherboard that I am building a system with and I have questions about the fan headers.

    There are 4 fan headers on this motherboard. These are CPU_FAN, SYS_FAN, SYS_FAN2, PWR_FAN. According to the manual, two of these are speed controlled; CPU_FAN and SYS_FAN. I know that CPU_FAN is controlled by a CPU temperature sensor. It is my understanding (which may not be correct) that SYS_FAN is not controlled by CPU temperature. SYS_FAN is controlled by a different temperature sensor. My first question is, where is the sensor that controls SYS_FAN located? Is it the A75 chipset temperature sensor?

    Also, am I correct in assuming that SYS_FAN2 and PWR_FAN run at 100% at all times? What components do system builders usually target by fans that are connected to SYS_FAN2 and PWR_FAN?


    Larry Tate

  2. #2
    Join Date
    Dec 2010
    Near Toronto but not in it

    Default Re: Gigabyte Fan Headers

    SYS_FAN typically uses the systems temperature on the MB. SYS_FAN2 and PWR_FAN are normal 3 pin fan headers that typically only have 12V (100%) power on them.

    I'll use them as an input/output fan to keep the air in the case fresh and circulated.

    Main Rig
    OS = Win10-64Bit
    CPU = Ryzen 1700x Overclocked to 4Ghz with custom water-cooling loop
    Mem = 16GB RAM @ 3200Mhz
    MB = Asus ROG C6H
    GPU = Asus 1080Ti ROG Strix
    HD = 512GB M.2 Samsung 960 Pro
    PSU = EVGA SuperNOVA 1300w
    Case = Cooler Master HAF-X 945

    HTPC / Home Server
    OS = Win7 64Bit running XBMC HTPC Front end with Windows Server 2012 Virtual Machine with 12GB ram assigned for homer server
    CPU = i7-980X @ 3.5Ghz CoolerMasster Hyper 212 Evo
    Mem = 24GB RAM
    MB = Gigabyte GA-X58A-UD5 v1.0 with F6 Bios
    GPU = EVGA nVidia GT210
    HD = 2x PNY 120GB Raid 0 (OS)
    Storage = 8TB WD Black Storage
    PSU = Corsair TX750
    Case = Define R5

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts