connecting 3 and 4 pin fans directly to PSU

Toggle sidebar Toggle sidebar
Solution
mickypheonix
Hi jleegreene
You can buy cheap cables to run from a 4pin molex on your psu to either 3pin and or 4pin for your fan
such as these
0142_MED.jpg

or to multiple fans
CM-108-BX_42789_350.jpg


you can get these molex to 3pin or molex to 4pin
and also at different voltages , 12V ,7V,5V
these reduce the speed of your fan thereby making it quieter if you so desire
Sort by date Sort by votes
mickypheonix

mickypheonix

Honorable
Mar 9, 2014
4,072
1
10,960
Hi jleegreene
You can buy cheap cables to run from a 4pin molex on your psu to either 3pin and or 4pin for your fan
such as these
0142_MED.jpg

or to multiple fans
CM-108-BX_42789_350.jpg


you can get these molex to 3pin or molex to 4pin
and also at different voltages , 12V ,7V,5V
these reduce the speed of your fan thereby making it quieter if you so desire
 
Upvote 0 Downvote
Solution
J

jleegreene

Reputable
May 13, 2014
5
0
4,510




Thank you sir!
 
Upvote 0 Downvote
Brendan_14

Brendan_14

Distinguished
Aug 14, 2012
106
0
18,710


It's not technically a bad idea, but you have more control if you can plug it into your motherboard, as you most likely know (most likely = 99% chance).

For anyone glancing upon this in a random google search though, plugging a 3/4 pin into your motherboard and either tweaking your BIOS settings or using software like Speedfan to auto control your fans gives you a quieter system compared to full throttle on with a 3/4pin-molex connector or a fixed molex connector that won't allow you to change fan speed without physically changing adapters.

Fan controllers are also a good option if you don't want to do it software side.
 
Upvote 0 Downvote
J

jleegreene

Reputable
May 13, 2014
5
0
4,510
I'm thinking of going the route of getting a fan controller. If i do, should i leave two of the fans plugged into the Mobo PWM/CHA fan headers, or should i just plug them all into the fan controller? does it really matter?



 
Upvote 0 Downvote
Brendan_14

Brendan_14

Distinguished
Aug 14, 2012
106
0
18,710
Well, you want to try and have your CPU cooler fans run off the software, or BIOS so that it's auto controlled. It'll take a lot of experience and confidence in your judgement/temp sensors to control the cpu fans. Technically you can run as many as you want off the fan controller, but I'd stick to just case fans to control.

http://www.newegg.com/Product/Product.aspx?Item=N82E16811997078

This can provide some auto coverage if you want to stay completely out of the software. just make sure your sensors are taped down well.
 
Upvote 0 Downvote
mickypheonix

mickypheonix

Honorable
Mar 9, 2014
4,072
1
10,960
Brendan_14 is correct you do have more control with your motherboard than a fan speed reducer , with a fan speed reducer you will have 12v,7v,or 5V ,3 set speeds, with the motherboard you can setup fan profiles and adjust the fan rpm to whatever speed you require.
A fan controller is a good option it will give you the option to control your fans with variable speeds.
As Brendan_14 said it is best to leave your cpu fan/fans plugged into PWM header for your cpu the motherboard so it will control the speed of your cpu fans so your motherboard can make the fans spin faster if the cpu gets hot or slow them down when not required to go at high speed
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom