Which power Supply to power 3/4 Pin PC Fans

[kuduku]

Hi guys
I have few spare 3/4Pin 12V RGM/Non RGB PC fans from Cooler Master And Arctic . Cooler Master is 12V 0.4 Amp 3PIN and Arctic is 4 PiN , need to check . I want to cool few IT hardware like ONT/ NUC/ DAS which cant be moved . All these are closeby under one shelf/rack . I want to run the fans using 240V power adapter , What my Googling has found

Solution 1
One requires exactly this for each fan - https://www.coolerguys.com/products...-or-4pin-pwm-connector?variant=20282817937504
I do have 3/4 spare 12 V power adapter over the years of this/that router/ modem but not the connector

or a 12V power Adapter with this connector cable which are 1$ on most Chinese websites but cant fine it cheap on Indian websites

Solution 2
or a 4/5 Fan controller with Power Adapter
https://www.amazon.in/gp/product/B09WN5JQJC/ (this has Motherboard Fan header Connector )
Another iteration for 3 pin/4 pin https://www.amazon.in/gp/product/B0CQ1Q1QNP/ or https://www.amazon.in/gp/product/B099RQCZ88/
Still no power Supply
or
Solution 3
a simple Power splitter
https://piplus.co.in/products/pi-pi...sleeved-splitter-pc-fan-power-extension-cable (this has Motherboard Fan header Connector )
https://piplus.co.in/products/pi-pi...ter-cooler-cooling-fan-splitter-y-power-cable ( this has 4 Pin Molex connector )
Still no power Supply


Solution 1 - Seems too expensive to run 3/4 fans . If i have to spend 1k+ on adapter then it better to just buy a Power supply for 1200/ like - https://www.amazon.in/gp/product/B09XQRMBCK/
Solution 2 and 3 are incomplete as dont have the power supply which i actually want
I checked robu.in but couldnt find 12V power supply ending in 3/4 PINs - https://robu.in/product-category/ba...-power-supply-adaptor/standard-power-adapter/

So what are people using to power 3/4Pin PC fans ?
All crypto mining guys are/were using such mods to cool so whats available under 1200/ bucks ?

 

[Heisen]

Don't worry about your fans being either 3pin or 4pin, for running them at their advertised speeds you need 2 pins. Positive and Negative. You can use any 12v power adapter and connect your fans in parallel, for example if you have 12V 2A power adapter, you can run 3 120mm fans easily.

For adapter you can use this one.
https://robu.in/product/orange-12v-2a-power-adapter-with-5-5-x-2-1mm-dc-plug/

For wires these are enough, 2 wires go to each fan.
https://robu.in/product/male-to-male-jumper-wires-40-pin-40cm/

For connecting all the fans to the DC power supply.
https://robu.in/product/female-2-15...pter-connector-plug-for-cctv-camera-pack-of-2

So your total becomes ₹681 including GST+SHIPPING. You can probably make this even cheaper if you have DIY instincts.

 

[kuduku]

Don't worry about your fans being either 3pin or 4pin, for running them at their advertised speeds you need 2 pins. Positive and Negative. You can use any 12v power adapter and connect your fans in parallel, for example if you have 12V 2A power adapter, you can run 3 120mm fans easily.

For adapter you can use this one.
https://robu.in/product/orange-12v-2a-power-adapter-with-5-5-x-2-1mm-dc-plug/

For wires these are enough, 2 wires go to each fan.
https://robu.in/product/male-to-male-jumper-wires-40-pin-40cm/

For connecting all the fans to the DC power supply.
https://robu.in/product/female-2-15...pter-connector-plug-for-cctv-camera-pack-of-2

So your total becomes ₹681 including GST+SHIPPING. You can probably make this even cheaper if you have DIY instincts.

Excellent informative . to the point post , I already have 4+ 12V Power Adapters with me , Might not be same power so fans might blow slowly but thats fine
I require only the jumper and jacks

Ordered from Robu.in

 

[kuduku]

Received from Robu.in


Corsair Fans , have atleast 3 of them , could be 4 also...


12V collection

Left to Right
1- 6V 0.5A
2- 12V 1A
3- 3V/4.5V/6V/7.5V/9V/12V 0.3A
4- 24V 1A
5- 12V 3A

I suppose 2 or 3 should be fine to run 1 fan

 

[dash2009]

Left to Right
1- 6V 0.5A
2- 12V 1A
3- 3V/4.5V/6V/7.5V/9V/12V 0.3A
4- 24V 1A
5- 12V 3A

I suppose 2 or 3 should be fine to run 1 fan

Avoid using 3, Your fan is rated for 0.4A and Adapter is for 0.3A. Even if the fan was 0.3A its still not a good idea to run any power supply at 100% load for extended periods of time.

For one or two fans no.2 and no.5 will be fine, For more than 2 fans you should use no.5 only.

 

[Heisen]

Avoid using 3, Your fan is rated for 0.4A and Adapter is for 0.3A. Even if the fan was 0.3A its still not a good idea to run any power supply at 100% load for extended periods of time.

+1

You also have to check which adapters are compatible with the DC connector you ordered (are you able to easily insert them), because of the pin diameter there can be differences.

Use No.5 it can easily handle 4 fans, looks to be in good shape and better built.

These are pin outs of the fan header. They are same for the 3 pin header.

You just have to find the PIN 1, by looking at the tabs, you can determine which one will be the PIN 1 (GND) and pin next to it will be the VCC (+12V).

One end of the wire you will be able to easily insert in the fan header, for the other one you have to tighten it with the screw driver.

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If there is a problem fitting all the fan wires into the DC connector plug, you can slice the wires and expose the copper, then first connect all of the GND wires together, twist them into a single one, and then insert it into the connector then screw it in. Similarly do the same for the other +12V wires.

 

[kuduku]

+1

---

If there is a problem fitting all the fan wires into the DC connector plug, you can slice the wires and expose the copper, then first connect all of the GND wires together, twist them into a single one, and then insert it into the connector then screw it in. Similarly do the same for the other +12V wires.

weekend work , All completed, Didnt need to splice them
testing connections


cable ties to secure it


Will add to NUC later

 

[ibose]

Will add to NUC later

Doesn't the NUC have its own fan ?

 

[kuduku]

Doesn't the NUC have its own fan ?

it has , but kept in a closed rack , gets hot as switched on 24x7