Questions about Arctic P12 Value Pack

For the mainboard

These are not PWM fans! So in PWM mode, the fans would spin permanently. However, some mainboards support PWM and DC mode with their 4-pin connectors. In this case, the fans can be controlled via the voltage. Just check the bios. It can also happen that only 3-pin connections of the mainboard are controllable. It would also be sufficient for case fans, as you can connect up to a maximum of 5 fans to one connection via an adapter.

Size specification is correct, mine are 120 x 120 mm. Maybe 1 - 2 mm smaller than other fans but the holes fit for installation.

Yes, the P12 is a good case fan, I use 4 in my pc (3 P12 + 1 P14). Anyway the whole airflow and airpressure discussion is dodgy. The behaviour is nice, exactly the same as a PWM fan but cheaper (except a PWM fan doesn't need to ramp up at boot up). The fans are mostly very silent for their speed except I get some vey low whinning, speed related (it could be my motherboard). I did change one of my fans by a spare one but today I noticed another noise which reduced by changing speed (I'm a nerd).

Why try to piss off the distributor here when you can't even manage to switch on your thinking organ? 1. manufacturer's number is correct... First search result on the Arctic page, unfortunately only visible through the photo. Write an e-mail to Arctic if you want to cry... 2. yes, the search results could be described more precisely, but here too the designation was taken from Arctic... So all your problems are due to you and possibly to the manufacturer. Please and greetings