Electronics knowledge needed

[Moinaldo]

Hello there! I want to connect two fans to one controller port. The thing is that each port on the controller I'm using can provide a maximum of 6W, and each fan is rated at 4.2W...

So, I wanted to know if connecting two fans would shorten the controllers life by trying to pull 8.4W, or if the controller will be fine and the result would only be that both fans would run slower by receiving half the power each one...

[Cyanotical]

for the most part, it depends on if the controller is the limiting factor

if the controller limits the power output to 6W, than the fans will spin at reduced speed

however, if the controller is not the limiting factor, ie it's simply rated for 6W but can deliver more until failure, then the fans will pull more and may damage the fan controller

also, wattage is voltage x amperage

so, since the voltage is 12V, we know that the Amps per channel is .5

12V x .5A = 6W

so you could hook up two fans safely, as long as the combined amps for both fans is .5 or less

[Moinaldo]

Thank you both for your answers.

The controller: Aerocool V12XT

Max wattage per fan channel: 6W

The fans: CM SickleFlow

Rated Voltage: 12 VDC
Current (Ampere): 0.35A ± 10%
Power consumption: 4.2W ± 10%

I've been running two fans on a single channel for a couple of days now, they spin slower than their max rpm, so I assume the controller is limiting the power as it won't allow me to input the maximum speed (i.e. 2000rpm) (and just let me set that port/channel to 1700rpm).

It's working right now, and have been working well all this time, but I wouldn't like to burn it by my negligence... if the fans speed is limited it's ok as long as it wouldn't damage the controller itself.