How do I count the fan power

Andreas W · 21 Feb 2012

Hi, im back with some more and probably annoying questions, I would like to use something like the link bellow but the description states that (When using in conjunction with a fan controller / motherboard header, be sure your controller can handle the total power of the combined fans) so that got me a bit confused, I understand that I add up the watt on the fans, but how do I know how much my PSU and the cable can handle? I am planing on using a molex to 3 pin connector that comes with noctua fans, could I use 2 of those on the same cable to then add the splitter to, or do I want to use 2 cables and use 1 molex to 3 pin on each cable? I am using a Corsair HX650 PSU and I tried looking at their site under specifications but that info made no sense to me

Phobya Y Cable Splitter - 3-Pin to 6x 3-Pin - White - FrozenCPU.com

linnemeyerhere · 21 Feb 2012

Andreas W,
You really have little to worry about with two fans connected. The issues are more geared for hooking up lots of fans like more than 4 to one fan controller terminal. I for one have three Noc's running off one 12v on my PSU and I always run them wide open with zero issues.

Andreas W · 22 Feb 2012

Wow weird, I tought I answered, was wondering why I never got a reply back but obviously something happen so my post dissapeared, oh well need to rewrite it then.

What I want to do is run about 9-10 noctua fans on 1 single molex cable, I counted the total watt from all the fans and it would be around 11.xx watt so should I be safe only using 1 cable, and if its to much stress on 1 cable would the computer boot up at all then or just refuse to boot?

linnemeyerhere · 22 Feb 2012

I don't believe it would effect the mobo at all. It might cause all 10 fans off (1) 12v molex off the PSU to run slower but I doubt it will. Now incorporating the fan controller into this mix could be an issue, again the fan controller will have to be of a high quality and have a healthy rating for continuous amperage.

Andreas W · 23 Feb 2012

Ok, and since I wont be using a fan controller at all there is not really any issue since 1 cable is capable of 12w right? and I do have enough fans so if they run a bit slower wont really matter I belive much temp wise, could be nice thou maybe a bit less noise.

cyclic · 23 Feb 2012

I have to wonder why you need that many fans anyway ?

linnemeyerhere · 23 Feb 2012

The OP has filled all available spots and though one could argue it's something when I acquire my 800D I'll do as well. When you run the Noctua fans and you get a sense of the quiet performance they afford you begin to find all the places you can place one.

Andreas W · 23 Feb 2012

cyclic said:

I have to wonder why you need that many fans anyway ?

Main reason is my tiny *** room that I have with no air circulation so if I can spend some money on fans that try get my components as cool as possible to save myself from needing to buy new ones because they overheat is something I feel its worth to do, and the second reason is because I am bored and want something to do and think doing these kind of things are fun.