Per the title, I have installed some high cfm and high wattage fans on my 4080, it works fine but i’m currently using a manual knob to control the dc. Because I bought them without even a fan header, they just have 2pin connectors - does anyone know of any controller hubs I can use to both power them (.7a/8.4w per fan), and control the dc via a mobo header?
The motherboard controls the fans with a PWM signal. Other posters are right that your motherboard can’t power your fans directly, but if you can find a suitable MOSFET module (or solder up your own) you can use the signal from the motherboard without pulling too much current and damaging it.
Something like this would work well: https://www.ebay.com/itm/225225930694