Question Is it possible to convert a proprietary NVIDIA RTX 2080 FE cooling fan to a 4-pin JST connector?

[zwtch_17]

So, I just bought an RTX 2080 FE cooling fan, and I realized it has a different connector than a normal aftermarket cooling fan (JST connector). I also wonder what cable is PWM, or tachometer. I already peeled off some of the sticker labels and found the wiring placement kind of different than that of a normal PWM fan (look at the image). I want to ask: is it possible to convert it to 4-pin JST? If it is possible, I will only swap some cables to the correct order, right?

https://imgur.com/a/7BhBkLd

 

[Ralston18]

Where was the fan purchased?

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My suggestion is to use a separate test bench setup with the applicable voltages and a multi-meter to test the fan and pins. Any cables that came with the fan.

What may appear proprietary could also be fake.

Figure out and map each of the four pins to learn what each pin does with respect to the fan.

Then determine if the fan can be used with respect to the intended environment by matching pins and cables.

Look for websites showing pinouts and wire colors.

For example (Cooler Master website):

https://landing.coolermaster.com/faq/3-pin-and-4-pin-fan-wire-diagrams/

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You could also scan the Q-code on the fan - may learn something from that.

 

[zwtch_17]

Where was the fan purchased?

= = = =

My suggestion is to use a separate test bench setup with the applicable voltages and a multi-meter to test the fan and pins. Any cables that came with the fan.

What may appear proprietary could also be fake.

Figure out and map each of the four pins to learn what each pin does with respect to the fan.

Then determine if the fan can be used with respect to the intended environment by matching pins and cables.

Look for websites showing pinouts and wire colors.

For example (Cooler Master website):

https://landing.coolermaster.com/faq/3-pin-and-4-pin-fan-wire-diagrams/

= = = =

You could also scan the Q-code on the fan - may learn something from that.

about February 6th, 2024, arrived at march 5th 2024. at the price of 6.5$

thank you for the suggestion, I already scan the QR code but it just a serial number, I will update after experimenting it.

 

[Paperdoc]

This fan was used in a video card for cooling and not intended for general case ventilation uses. You would have to find exact specifications for it, and that is not easy.

You seem to be making a common error. You can NOT ASSUME that a fan with four obvious electrical contacts is the SAME as a standard computer case 4-pin PWM fan! Four pins is NOT the SAME as 4 pins!

But even if the fan IS the same, figuring out the functions of the four pins is not easy and you can NOT do it with a simple voltage meter. On a standard 4-pin PWM fan, these are the functions of the pins:
1. Ground
2. +12 VDC always - power supply
3. Speed signal (below)
4. PWM signal (below)

SPEED signal is generated in the fan and is sent back to the mobo header for counting. It consists of a series of pulses, 2 per revolution, amplitude +5 VDC. The mobo counts the pulses to determine speed.

PWM signal is sent from the header to the fan on Pin #4. It is similar to a classic "Square Wave" because it is either fully "On" or fully "Off". For a Square Wave it is "On" exactly 50% pf the time always. For a PWM Wave the "% On" value is varied from 0% to 100%, and that is the information it conveys. In a computer case fan, this signal is 5 VDC amplitude, and at a fixed frequency of 20 to 22 KHz.

So, to detect those two NON-DC signals you would need at least a modest oscilloscope system and a small 12 VDC power supply. PLUS to start with you would need some guess about which two terminals are the +12 VDC and Ground. And still, that approach ASSUMES that this fan's terminals ARE the same as a standard 4-pin PWM fan.