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Thread: ASUS - Official AMD 9xx Chipset Series Motherboard Support

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  1. 07-04-2011, 12:52 AM #11
    fastleo63
    fastleo63 is offline
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    Quote Originally Posted by nex_73 View Post
    4-pin fans: choose PWM in uefi
    3-pin fans: choose DC in uefi
    I have to do that on my ChIV - think is the same for you?
    Thank you! I haven't got enough time to deeply explore this new uEFI BIOS... Hoping that these options will be present in my BIOS...
    Mainboard manual indicates that CPU_FAN and CPU_OPT pins are "strictly" 4-pin fan oriented (in fact, the fourth pin is assigned for FAN PWM).
    Instead, Other headers (CHA_FAN1-3) have pin 4 marked as a +5V output.
    I think the only way to manage 3-pin fans is to connect them only to CHA headers.
    Last edited by fastleo63; 07-04-2011 at 01:59 AM.
    MB: ASUSTeK Sabertooth 990FX BIOS 0705 | CPU: AMD Phenom II X6 1090T | RAM: G.Skill Ripjaws 2 x 4GB DDR3-1600MHz CL7-8-7-21-1T | Blu-Ray writer: ASUSTeK BW-12B1LT | HDD: SSD OCZ Vertex Turbo 60GB + HW RAID-5 3TB (HighPoint RocketRAID 4310 PCIe x8 SAS adapter - Intel IOP348 based) | VGA: NVIDIA GeForce GTS 450 1GB GDDR5 | O.S.: MS-Windows 7 Ultimate x64 SP1
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