[SOLVED] Is there a controller for 3 Pin non-PWM Fans, which will convert PWM to voltage adjustment?

[0vertime]

I have 12x 3 pin, non-PWM, Yate Loon fans, while quiet, would love to adjust the voltage via a PWM ?signal?. I see lots of cheap controllers out there but they all state it will not work for adjusting voltage. Even the expensive Controller for my ARGB will not handle the 3pin. All the voltage adjustable controllers I have found require adjustment manually.

Does anyone know of such an animal? Or am I just dreaming...?

 

[JohnBonhamsGhost]

you should be able to choose DC mode in the BIOS for each 4 pin motherboard header supporting a 3 pin fan.

 

[Paperdoc]

Since you are trying to use 12 fans, I suspect you want a fan HUB because you don't have enough mobo headers. Even using Splitters for groups of fans connected to headers configured to work in Voltage Control Mode (the ONLY way to control 3-pin fans from a mobo) you might not have enough headers.

What you want DOES exist and works well. See these

https://www.amazon.com/Phanteks-Universal-Fan-Controller-PH-PWHUB_02/dp/B07NHQRCRM/ref=sr_1_1?crid=YHL8515L5Q6Y&dchild=1&keywords=phanteks+universal+fan+controller,+ph-pwhub_02&qid=1635701693&sprefix=Phanteks+universal,aps,102&sr=8-1

https://phanteks.com/PH-PWHUB_02.html

The manual is here

https://phanteks.com/assets/manuals/PH-PWHUB_02.pdf

This Hub has eight ports all together. Of these, four are PWM (4-pin) fans only, three are for 3-pin fans, and Port #1 claims it can handle either type. It comes with cables to connect to a SATA power output connector from the PSU for fan power, and one to go to a mobo SYS_FAN header. That header should be configured to use PWM Mode so that it feeds the Hub with that PWM signal, although the Hub itself claims it can work in either mobo Mode setting. The Hub also comes with a manual control box in case you can NOT connect to a mobo header, but do not use that option.

So, you can use Port #1 plus the three 3-pin fan ports. How to connect 12 fans there? Use SPLITTERS like these on each of those four ports.

https://www.amazon.com/Computer-Splitter-Connector-Sleeved-Adapter/dp/B00DYQSZ68/ref=sr_1_5?crid=2U92YNXF3V9CH&dchild=1&keywords=3-pin+fan+splitter&qid=1635702521&sprefix=3-pin+fan+splitter,aps,107&sr=8-5

Get three or four of them. You can connect up to four 3-pin fans using one of these to a single Hub output 3-pin port. The LIMIT on this is the max AMPS used by each fan you have. In general, EACH Hub port can supply up to 1.0 A current; further, the TOTAL load on all ports combined cannot exceed 4.0 A. Now, look at the labels on the fans you have. They should note the VOLTAGE (12 VDC) and the max CURRENT(often 0.20 A). SOMETIMES they specify WATTS instead, so use Amps = Watts / 12 Volts. Add up the Amps max for the number of fans you plan to connect to ONE header using a Splitter (say, 4 fans on one Splitter and header). If that does not exceed 1.0 A, then you are OK to do that. So IF your fans use 0.20 A max each, you could safely connect four of those using one Splitter to each of the three 3-pin fan ports of that Hub, and presto! 12 fans connected and controled. Just one note here: Ensure that at least ONE fan is connected to Port #1 so it can send a fan speed signal back to the mobo header.