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Thread: GA-Ep45-ds3r fan control issue




  1. #1

    Default GA-Ep45-ds3r fan control issue

    Hi. Not sure if its been addressed, but this board seems to run cpu fans with 3 pins at 100 percent power. Has there been a fix to let ga-ep45-ds3r boards finally be compatible with 99% of CPU fans currently available?

  2. #2
    Join Date
    Apr 2008
    Posts
    942

    Default Re: GA-Ep45-ds3r fan control issue

    Quote Originally Posted by Sunburn74 View Post
    Hi. Not sure if its been addressed, but this board seems to run cpu fans with 3 pins at 100 percent power. Has there been a fix to let ga-ep45-ds3r boards finally be compatible with 99% of CPU fans currently available?
    Thats normally the case as Pin 2 is +12volts which is the supply operating voltage for PWM fans. (that remains a constant) So 3 Pin fans when connected remain going flatout. You couldn't safely vary a 3 pin Fan for the CPU Cooler, because all fans have different start voltages and many simply wouldn't start when the CPU was cool.
    Last edited by VorLonUK; 12-26-2008 at 07:53 PM.
    GA-P35C-DS3R Rev2.0 F11 bios, E8200 (@3.0Ghz), OCZ DDR3 PC3-10666 Reaper 4GB (@1200Mhz), Xonar D1, 8800GTS 512, Corsair HX520 (Single 12volt line, Max 40A), WDC 3200aaks/5000aaks in AHCI mode, Vista 64 Premium.

  3. #3

    Default Re: GA-Ep45-ds3r fan control issue

    So most people with this board concerning their cpu fans are doing what?

  4. #4
    Join Date
    Apr 2008
    Posts
    942

    Default Re: GA-Ep45-ds3r fan control issue

    Quote Originally Posted by Sunburn74 View Post
    So most people with this board concerning their cpu fans are doing what?
    "Most people" are probably using the 4 pin pwm fan that comes with the stock cooler, or an aftermarket cooler with a 4 pin pwm fan.

    All 3 pin fans (pc 12volts) are designed by default to run at maximum speed. Of course some are far better than others when being used on a linear or pwm type fan controller and can start and range up from as low as 4 volts. Some though won't start even at 8 volts, hence it's not usually an option to control a 3 pin Cpu fans speed via the motherboard - hardly reliable.
    Fan headers now, allow connection of 3 or 4 pin fans. The 3 pin will usually run flat out, where the 4 pin can be controlled via it's speed control line. The 12volt supply usually remains a constant.
    GA-P35C-DS3R Rev2.0 F11 bios, E8200 (@3.0Ghz), OCZ DDR3 PC3-10666 Reaper 4GB (@1200Mhz), Xonar D1, 8800GTS 512, Corsair HX520 (Single 12volt line, Max 40A), WDC 3200aaks/5000aaks in AHCI mode, Vista 64 Premium.

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