They are supposed to be powered from 24V to get full RPM. How in computer system it is supposed to power them with 24 volts? Where from should I get 24v? Should I buy additional power supply and or controller for them? What are that devices?
What should be "full pipeline" from outlet to the connector of such fan? And how motherboard can control it via PWM if its supposed to be connected to something else?
PS. I know that I can power them from 12v, also i know that there are 12v versions. I am asking about 24v versions usage