I don’t see how that would imply anything about detecting more than 3 fans. It should be there, at least the description for nvidia-setting’s gpufantarget implies: I’m happy to provide any information that might be needed, but I would imagine it’s a simple process to just add capabilities for a third fan to the drivers. I pay 1700 USD for a top of the line GPU and I can’t even have drivers that report all the fans. In Linux, when I set manual fan control, I can only control the first two fans because there are only two fans reported. This is the second RTX 3090 I’ve had this issue with, and It works perfectly fine in Windows, I can go in and change the sliders for all three fans, and all three fans respond accordingly.

Well, I can’t get my third fan to come on.

This makes sense for FE/Reference cards that only have two fans, but most AIB cards, especially newer/high end ones, have three fans and are not designed to run with only 2. So, the Nvidia drivers on Linux only report up to two fans, regardless of how many fans the GPU has.

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