Hook up fan to motherboard

not enough fan-headers on motherboard???

The fan will potentially run at full speed, so if you would like to reduce the speed of the fan you will need to adjust the fan speed setting in your BIOS or use fan control software such as SpeedFan in Windows. The only other problem to consider is that occasionally, components immediately adjacent to the motherboard fan header can get in the way of the larger 4-pin fan connector, physically preventing connection.

This problem also occurs if you try to use an in-line fan speed controller such as the one made by Gelid. Another avenue to explore is the possibility of using a bay-mounted fan controller. Several models are available now which provide 4-pin fan headers, so this is an easy way to use 4-pin PWM fans in a PC system which has only 3-pin fan headers on its motherboards. When using this method, you may find it necessary to disable any fan warning settings in your motherboard BIOS, since the motherboard may incorrectly believe that its CPU fan has failed when the fan is connected to a fan controller rather than directly to the motherboard itself.

Re: replaced psu fan, connected to fan header on motherboard

Joined Jan 20, Messages 0. I usually let the mobo decide mine because I don't have much interest in the fine tuning of my case fans, for something like CPU fans though i use a control program in Windows that lets me control them from the mobo header. Sasqui Feb 3, Joined Dec 6, Messages 10, 2. PC heats up, fans spin faster and cool them back down again. Fans stay clean for longer too.

Do you use case fans plugged into Mobo or direct power?

I wouldn't go any other way. My radiator has three fans connected to speed controllers, that's the only exception. Joined Jul 2, Messages 24, 5. I have 4 fans on 2 controllers built into my case. The cpu fans are controlled by the motherboard.

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I personally prefer manual control over my fans with my fingers vs letting software control the case fans, It helps keep the noise down. Plus I've had my fans at lowest setting for Ryzen Blender and the system did fine with them. The cpu fans reved where needed. It came from the factory with a molex connector but I'm thinking about plugging them into the main board.

Joined Jul 25, Messages 11, 2. I see that option missing. Joined Mar 17, Messages 7, 1. Joined Feb 19, Messages 6, 1.

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Both But not if they have a Molex. Molex goes to PSU only for me. Joined Mar 10, Messages 6, 1. Joined Oct 17, Messages 9, 4. I can't think of a good reason to direct connect the fan to a power supply unless it's got a speed controller built into the power plug. The way I look at it there's only two reasons to do it that way.

  • Controlling fans via motherboard or case fan controller :: Hardware and Operating Systems?
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  • Question about connecting fans to motherboard.

One being that you had no other choice. Either way the system needs to be reconfigured if either of those are true.

not enough fan-headers on motherboard???

Flow Feb 3, Joined Oct 8, Messages 0. Yeah, I also use both. Though I prefer the mobo fan headers because of rpm monitoring. As for full speed or auto etc, that depends on users preference. For instance, not auto for motherboard header, it takes too long for it to kick in. So with simple webbrowsing or watching a movie it stays just below that and produces no sound at all at approx. I did have to lower the warning for low cpu rpm setting though. I have one front case fan at rpm, the other front case fan is but makes too much noise for my taste so I limited it to around rpm.

Strangely though the rear fan is the same rpm and barely audible at that speed.

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The sidepanel fan is rpm silent type so full speed. My top fan doesn't seem to do better at full speed or lower.

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