I have the early version of the turingpi, that only has the 12v connector for the fan. Just got my new turingpi case. I bought one of these: https://www.amazon.com/dp/B07PG6927T, and it works, but its loud. Also, the connector is not quite the same as that on the board, so it fits funny. Anyone have recommendations for either a really quiet fan, or a 12v one that has a knob to turn down the speed? I'd love to get one with the right connector too, just to feed my adhd some.

I have a 2.4 board and my fan is driving me crazy. Someone mentioned a while back that one could introduce a PWM (4-pin) fan header with a bit of hacking and soldering. I came across this suggestion after I was researching a way of controlling the fan through ambient case temperature measurement (e.g. adafruit emc2101 pwm temp board) etc I'm not a hardware person so I'd also welcome some guidance and support on elegant and enduring solutions.

There is this: https://www.nico-maas.de/?p=2702, but my soldering skills were not up to putting that little chip on

I’m also looking for a quiet case fan that connects to the 2-pin header on the original v2 board. The Turing Pi specs page describes this as a “2 Pin small Molex Fan Power Connector”. Has anybody found a fan that connects to this connector properly? Or failing that an adaptor? …or even the exact name of the “small Molex” connector? 😅

Any PC case fan comes with a 3 or 4 pin connector that will fit on the 2pin. The third pin is for the tachometer, and the 4th would be for PWM control. My recommendation is to get a Notcua fan because they come with a "low noise adapter", which is just a nicely packaged and wrapped inline resistor to cut the voltage. Fans spin at like half speed, which is plenty of airflow for a TPi2

Oh, interesting. Any idea what sort of connector I’d need to connect a 4-pin fan to the fan header on the board?

Any 12VDC fan will work with the 2-pin header on the original Turing Pi 2. The 4-pin, female connector on a PWM Fan's cable should be key'ed. Do not attempt to use a 5VDC fan. It will burn out. (Note: the 4-pin, JST 1.25mm micro connectors for NVIDIA Jetson active heatsinks are 5VDC.) If you want to control the fan speed of a PWM fan, you can purchase a separate, variable speed fan controller like the Noctua NA-FC1. Some Noctua PWM fan kits include a simple fan speed reducer cable. These cables incorporate an in-line resistor to reduce the voltage by roughly 50%.

Thanks Dan 🙏 Let me try connecting a 4-pin fan to the 2-pin header later today and report back 🫡

https://cdn.discordapp.com/attachments/1335661503759519754/1349420678289297448/PXL_20250312_163139565.MP2.jpg?ex=67d30970&is=67d1b7f0&hm=a6f34a63d218c3cd69046c2bfb29c9defa663d6e2228fb2aff35e165f4fa80af& https://cdn.discordapp.com/attachments/1335661503759519754/1349420678650138736/PXL_20250312_163215062.MP2.jpg?ex=67d30970&is=67d1b7f0&hm=6b77c30e68b87ff5622c4da75f1d7dc09481036576252fa746db4ef4b9dce444&

Thank you, Dan, you were of course correct 😀 I was able to cleanly connect a 4-pin Noctua fan to the 2-pin header, and although it’s a bit wobbly it’s clearly meant to connect and stay connected. Mission complete! Respect++

Good to hear. Glad I could assist.

And for reference, the fan I’m now using is a Noctua NF-A12x25 (https://noctua.at/en/nf-a12x25-pwm) which came with the low-noise adaptor cable included 😀

I believe that is the one I used in most of my cases. Originally, I was going to use it in the Turing Pi 2 Mini ITX case, but decided to use the Noctua Chromax NF-A12x25 to keep everything black. Note that this fan does not include a low-noise cable.

Oof, if I’d seen that a few weeks ago…! Oh well, nothing wrong with brown. And I was able to confirm that it worked minutes before the postman arrived to take it away as an Amazon return, so I’m certainly not complaining! 😀