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Thread: 3 pin fan - 4 pin fan header




  1. #11
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    Default Re: 3 pin fan - 4 pin fan header

    Thanks Chike, from that info I think I'll start with the default 1600 RPM and see how that works for noise and cooling.

    Thanks to all for the input on this. It got slightly off-topic from the OP so appreciate the responses. I'll probably be posting more once I assemble everything and will want advice on BIOS settings for the GB MB listed. The previous system I built (my first-also with a Gigabyte MB) for a friend was pretty much leaving everything at default and it worked fine (I was just happy it posted and worked!). This time I'd like to delve into the BIOS a little more and learn something. Who knows, I may even try a very small OC!

  2. #12
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    Default Re: 3 pin fan - 4 pin fan header

    I have a Noctua fan that gets varied with the motherboard's smartfan feature. Read this post - My New Computer. Impressed with the O/c. - Page 7 - Windows 7 Forums
    - My System Specs -
    GA-X58A-UD5 MB (F6 bios)
    Core i7-950 @ 3.8GHz Processor
    Noctua NH-C12P SE14 CPU Cooler
    6 gig Corsair Dominator - TR3X6G1600C8D
    ATI Radeon HD6950 2Gig Video Card
    Creative X-Fi Titanium Pro Souncard
    Antec Signature SG-850 PS
    Cooler Master HAF X
    Win7 Ult x64

  3. #13
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: 3 pin fan - 4 pin fan header

    Check out the Noctua NF-B9 FAQs on their website.
    The second to last item says:
    The fan doesn’t start with the Ultra-Low-Noise Adaptor (ULNA)!
    Unfortunately, many Gigabyte mainboards use a special control circuit that can lead to start-up problems in conjunction with the Ultra-Low-Noise Adaptor (ULNA). This control circuit remains active even when automatic fan control is disabled in the BIOS. In these cases, please use the fan without the ULNA or connect it directly to the power supply (or an external fan controller) in order to ensure reliable operation with the ULNA.
    Q9650 @ 4.10GHz [9x456MHz]
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  4. #14
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    Default Re: 3 pin fan - 4 pin fan header

    Quote Originally Posted by profJim View Post
    Check out the Noctua NF-B9 FAQs on their website.
    The second to last item says:
    That's interesting.

    Anyways, there's this with regards to the fan speed variance....

    Noctua.at - sound-optimised premium components "Designed in Austria"!

    Can I run Noctua fans on 4-pin PWM connectors and use my mainboard’s automatic fan controller?

    You can simply connect our fan's 3-pin connector to the 4-pin PWM sockets of today's mainboards so that the fourth pin that transmits the PWM signal is left blank (due to the shape of the connector, there's no danger of reversing polarity). Most current mainboards are capable of controlling fans not only via PWM, but also by adjusting the supplied voltage. In some cases, this may require you to change BIOS options like "Fan Control Mode" from "PWM" to "Voltage" or "Analog". Please consult your mainboard's manual in this regard. However, most current mainboards use an "auto" setting by default that automatically chooses PWM or voltage based regulation according to the connected fan. Automatically controlling the fan speed may not possible on mainboards that pulse the power rather than lowering the fan voltage.

    What that basically says is yes, if the MB supports it, the fan's speed can be controlled by the motherboard. You just need to set the BIOS options.

    If you read the link to my post, you'll realize that my fan is running around 880ish RPM (without any noise adaptors) but will rise to its full 1200RPM as required by temps (voltage).

    My point? If you're concerned about noise, if you use Gigabyte's smart fan in the BIOS, the fan will be throttled until full speed is needed.

    Also Noctua's fans tend to be quiet anyways. BTW I have the NF-P14 fan - Noctua.at - sound-optimised premium components "Designed in Austria"!, which is a 3-pin fan. And as I stated earlier, I don't use the noise adaptors.

    Peace
    - My System Specs -
    GA-X58A-UD5 MB (F6 bios)
    Core i7-950 @ 3.8GHz Processor
    Noctua NH-C12P SE14 CPU Cooler
    6 gig Corsair Dominator - TR3X6G1600C8D
    ATI Radeon HD6950 2Gig Video Card
    Creative X-Fi Titanium Pro Souncard
    Antec Signature SG-850 PS
    Cooler Master HAF X
    Win7 Ult x64

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