Control Radiator Fan Speed - Overclock.net

ccc106 · 06-30-09

I just finished assembling and bleeding my first WC setup. I'm using a MCR320-QP radiator with three Yate Loom medium speed fans. Motherboard is an ASUS P6T6 WS.

Since for now I will only be cooling an i7 920, I was trying to have the cpu temperature control the fan speed of the radiator fans. From what I've read, the cpu fan connector on the motherboard is a 4 pin PWM style regulator. I don't believe the bios settings allow for the cpu fan to be voltage controlled. Since the Yate Loom fans are not PWM they must be voltage controlled. Can anyone offer any insight as to if this is easily accomplished and if so how?

Thanks for any help. I'm looking forward to seeing how my first setup performs.

kimosabi · 06-30-09

Well the easiest way is to use a fancontroller.Something like a Zalman or any controller for that matter. Just hook up the fans to that and adjust all you want.

They take no more than one 5.25" bay so you'd have to sacrifice that though. Usually they are powered by one molex from the PSU and the channels are usually connected via 3-pin. It's plug and play basically.

Sometimes you will need extentions or molex--->3-pin adapters though.

hurrp · 06-30-09

get a fan controller, the sunbeam Rehobus Extreme is a good one.

_AKIMbO_ · 06-30-09

Yes, I second the recommendation of the sunbeam rheobus extreme. It's a good fan controller.

ccc106 · 06-30-09

Thanks for the advice. Is there any way of having the speed adjusted automatically based on the cpu temperature given by the bios sensor? I would ultimately prefer not to have to manually adjust it if at all possible.

kimosabi · 06-30-09

Ofcourse, the Rheobus Extreme is a good one too. Forgot that one. Although that's what I use. 30W per channels and six of them. It's a beast.

Here's mine:

ccc106 · 06-30-09

I was thinking of maybe putting a switch and being able to switch all fans between 5V and 12V. Do you think that the three fans at 5V will provide sufficient cooling for the cpu most of the time? I figure if I need to do something very cpu intensive I can just flip the switch and run them at 12V. What do you think?

hitman1985 · 06-30-09

get the fans connected to your board via 3pin molex, and steer them via speedfan, issue solved no money spent, if you have the spare parts kicking around at least

p.s. i dont see how the medium loons are that loud, i have 4 of them in my case and they are pretty quietly running with each other

ccc106 · 06-30-09

I'm assuming you mean connecting them to the cpu fan header. If so, how do you recommend connecting the three fans to the one header? Also, do you know if the P6T6 WS offers voltage regulation for the cpu fan or just PWM?

kimosabi · 06-30-09

I wouldn't connect that many fans to the mobo and certainly not to one header. Be kind to your mobo and let the juice go where it's needed the most.

Let the PSU take care of everything else. A mobo fan-header has it's limits on how much it can feed. I doubt that it's advisable to feed three Yate Loons on one header. Check the instruction manual of your mobo.

5V would barely let the fans spin. The switch would have to be multi-resistant. As in a two step switch if you don't want to use a reostat/potensiometer or a multichannel fancontroller. It's hard to find the correct voltage out from a switch unless you have a volt-meter/multimeter to check the output from the switch.

06-30-09	#1 (permalink)
ccc106 New to Overclock.net Join Date: Jun 2009 Posts: 8 Rep: 0 Unique Rep: 0 Trader Rating: 0	Control Radiator Fan Speed I just finished assembling and bleeding my first WC setup. I'm using a MCR320-QP radiator with three Yate Loom medium speed fans. Motherboard is an ASUS P6T6 WS. Since for now I will only be cooling an i7 920, I was trying to have the cpu temperature control the fan speed of the radiator fans. From what I've read, the cpu fan connector on the motherboard is a 4 pin PWM style regulator. I don't believe the bios settings allow for the cpu fan to be voltage controlled. Since the Yate Loom fans are not PWM they must be voltage controlled. Can anyone offer any insight as to if this is easily accomplished and if so how? Thanks for any help. I'm looking forward to seeing how my first setup performs.

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Control Radiator Fan Speed

06-30-09	#5 (permalink)
ccc106 New to Overclock.net Join Date: Jun 2009 Posts: 8 Rep: 0 Unique Rep: 0 Trader Rating: 0	Thanks for the advice. Is there any way of having the speed adjusted automatically based on the cpu temperature given by the bios sensor? I would ultimately prefer not to have to manually adjust it if at all possible.

06-30-09	#7 (permalink)
ccc106 New to Overclock.net Join Date: Jun 2009 Posts: 8 Rep: 0 Unique Rep: 0 Trader Rating: 0	I was thinking of maybe putting a switch and being able to switch all fans between 5V and 12V. Do you think that the three fans at 5V will provide sufficient cooling for the cpu most of the time? I figure if I need to do something very cpu intensive I can just flip the switch and run them at 12V. What do you think?

06-30-09	#9 (permalink)
ccc106 New to Overclock.net Join Date: Jun 2009 Posts: 8 Rep: 0 Unique Rep: 0 Trader Rating: 0	I'm assuming you mean connecting them to the cpu fan header. If so, how do you recommend connecting the three fans to the one header? Also, do you know if the P6T6 WS offers voltage regulation for the cpu fan or just PWM?

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