Fan setup help please, are PWM fans quiter running under 50% [Archive]

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ptrout

07-18-2009, 03:25 PM

Been like 4 years since my last build. So much has changed.

Ok to the question.

I am trying to figure out if PWM fans such as below run better/quieter (no clicking sound) when run at 50% of max output than their non PWM counterparts.

Delta PWM fan (http://www.frozencpu.com/products/8565/fan-531/Delta_120_x_25mm_High_Speed_PWM_Fan_-_11311_CFM_AFB1212SH-PWM.html?tl=g36c365s936)

Would this work well with a PWM fan controller ? I noticed most fan controller are 3 pin, and PWM fans have 4 pin but small MB size.

This will mount to a Feser 360, so most of the time I want it to run 1200-1500 RPM, and heading north as temps dictate.

Thanks for any help. I am just looking for a fan solution that allows me to run it under 30 db for most uses and still in the sweet spot for the feser 360, but giving me the option to kick it up to 2500+ RPM when deeded.

Utnorris

07-18-2009, 03:41 PM

To my knowledge that fan is a jet engine. The problem you run into with such fans is that they usually have a voltage range from around 8v-13v, so if you go to 50% it may not run. You should look at the Yate Loons, much cheaper and the concensus is that they are very good on most rads. If you really want the best performing fans you can try and find some San Ace fans. Just go check the sticky with the guides and look at the fan reviews. This should help you quite a bit.

ptrout

07-18-2009, 04:17 PM

San Aces are almost impossible to find these days.

I went it was either down to running sythe s-flex-f's

or

Delta or Panaflo with a fan controller, was just looking into if fan controller will be able to run those fan at 6-9 volts and do it some what reasonably.

thanks

Hondacity

07-18-2009, 09:39 PM

for proper pwm control on the fans you need 4pins...

if you use the 3pin you're directly lowering the input voltage..thereby not utilizing the pwm function..

thats a good spec'd fan...two left...lol

PatRaceTin

07-18-2009, 10:03 PM

delta fan is an industrial fan aiming for high cfm but it cause a lot of noise

hellcamino

07-18-2009, 10:44 PM

Try these http://www.newegg.com/Product/Product.aspx?Item=N82E16835185092 they move more air than my Panaflo Ultra high speeds did at 5v and are much quieter while doing it. I just swapped out all of my Panaflo's for these and temps and noise both went down. When I say try these I mean without any fan control. They are impressive fans for their db and pressure both.

Dark Bishop

07-18-2009, 11:58 PM

might try these
Artic cooling 120x38mm pwn fan (http://www.frozencpu.com/products/7241/fan-432/Arctic_Cooling_Arctic_Fan_12_PWM_120mm_x_385mm_Fan _ACF12PWM.html?tl=g36c365s935). says 12v operating range. ive been thinking about getting a few pwm fans for the radiator and running one from the mobo so it can somewhat self regulate.

ptrout

07-19-2009, 03:05 AM

Yeah Idealy that what I am aimfor myself. Though I dont think my mother board header can support the power draw of these fans.

Also anyone know if its possible to daisy chain PWM fans ? If so any guides to that would be appreciated.

So far only 4pin PWN fan controller I found was this one by Zalman (http://www.frozencpu.com/products/5953/bus-102/Zalman_ZM-MFC2_Multi_Fan_Controller_-_PWM_Fan_Ready.html?tl=g47c17s240) and it only has 1 PWN header, other 3 are 3 pin.

I have alreday tried the gentle typhoon ap15, nice and quite, but cant push enough air through both the feser360 and the haf932 top holes.

thanks all

ascl

07-19-2009, 04:39 PM

Yes it is possible to daisy chain PWM fans, so you should be able to connect the 12v and GND wires directly to your PSU and (only one of) the rpm wires to your mobo, and then join the signal wires together and attach them to your mobo. However, I think you can only join up to 3, due to the constraints on the signal wire.

Artic Cooling has PWM fans that allow chaining of up to 5, but with wire length constraints.

Dark Bishop

07-19-2009, 06:35 PM

link? these pwm fans sound like a good way to let my computer monitor itself during the summer while its folding and im at school or work.

ascl

07-19-2009, 07:51 PM

I am highly sceptical that 'PWM sharing technology' actually means anything other than linking the control line.... but here is the link:
http://www.arctic-cooling.com/catalog/product_info.php?cPath=3_47_65&mID=143&language=en

EDIT: Just noticed I linked an odd size... it was the first link in google... but I am sure you can deal with navigating the artic cooling site for other sizes :P

Dark Bishop

07-19-2009, 10:16 PM

hm, the way i read it sounds like the one cpu fan acts kinda like a master control fan and tells the bios what to set the other to.

How does PST work?
PST, PWM Sharing Technology, is a function for sharing the PWM signal. This is possible due to a signal amplifier integrated in every PST fan. Using ARCTIC F Pro PWM fans can build up a PST system of up to 5 fans (including CPU fan), which are then controlled by ONE single PWM signal. By setting one parameter for the CPU cooling in the BIOS you control the entire system according to you preference – silence or performance.

from one of their news letters.

brinox

07-19-2009, 11:20 PM

http://www.arctic-cooling.com/catalog/product_info.php?cPath=3_48_68&mID=144 is what i use. i plan on replacing ALL of the fans in ALL my desktop systems with these fans (i have 3 currently). They say the most you can daisy chain is 5, and thats due to the original design spec of the PWM fan header controller system. most mainboards nowadays can handle quite a few more. my case will soon have 8 all running off the main CPU fan header.

i cannot find where i read that little bit of info, so i apologize for showing up empy-handed in that respect

Hondacity

07-19-2009, 11:40 PM