Recent content by HairyOnion

Thankyou Paperdoc for the detailed explanation, my mother board does have a 5v d.led header that can supply 2 amps so I could mix use the 2 pins from there and 2 pins from one of the 12v pwm headers, but it is stiill a terrible solution. I have decided to send the fans back and buy the 12v...

I think so, but i want to set a curve so the rpm increases and descreases , I think the low noise adapters are resistors that reduce the the rpm by a set amount which would probably prevent them hitting full speed if that was needed.

update: The fan hub passes 12v to the fans I tested with a multimeter. The fan hub doesnt pass the pwm signal correctly. This is how I know... The fans come with these usb adapters so I used one of them to power the hub. I then decided to connect the sense and pwm pins from a 12v motherboard...

Funny thing is I bought that, I should have mentioned. It only lets me run the fans at 800 rpm

I bought some 5v Noctua NF-A20 PWM fans. I didn't know about motherboard fan headers being 12v so I shouldn't use them. I want to be able to vary the fan speed. I want to be able to connect a PWM fan hub to the 12v PWM headers on the motherboard. So for this to work the fan hub would need to be...