Do different motherboard fan 3-pin connectors have different speeds?

[lollybo]

I was having noise problems even though my fans were supposed to be "quiet" fans. When opening up my case, I realised that my front intake fans were extremely fast and moves more air than my side and rear intake fans. Logically, I assume that the rear intake fan is supposed to be the most powerful. My fan slots are fan 1 fan 2 and fan 3, there is no label on which should be which fane, but logically I think the rear fan should be the most powerful. Should I replug my fans? I have a chaintech vnf4.

 

[Fullmetal Chocobo]

Originally posted by: lollybo
I was having noise problems even though my fans were supposed to be "quiet" fans. When opening up my case, I realised that my front intake fans were extremely fast and moves more air than my side and rear intake fans. Logically, I assume that the rear intake fan is supposed to be the most powerful. My fan slots are fan 1 fan 2 and fan 3, there is no label on which should be which fane, but logically I think the rear fan should be the most powerful. Should I replug my fans? I have a chaintech vnf4.

The 3-pin fan headers on the motherboard just provide power (+12V, and 1.5a max on some). The speed of the fans are relative to the fans themselves. If you are having noise problems, consider using a fan controller (such as from Jab-tech or Performance PCs. Just keep an eye on your systems temps.

EDIT: There are things such as "Cool & Quiet" on Nforce 4 mobs that will slow down a fan, depending on temperature. Check your mobo manual and BIOS for settings regarding this.

 

[Bobthelost]

Most (ok, every single one i've heard of) motherboard headers will supply 12v as standard, and can be adujsted to supply less power so the fans run slower.

The rear exhaust fan should be the one with the most airflow, intake fans on the front don't do much for the most part and while i can see that the side intake may well help i never liked them.

What fans are you using?

 

[lollybo]

the one in the rear is an antec 120 mm the one on the front and side are rosewill 80 mms

 

[Bobthelost]

What speeds?

Rosewill are not known for quiet fans.

 

[fire400]

it will provide power according to the fans' needs. it's interesting to note, however, that you can adjust fan speeds with software according to power outage from the pin connectors. the design is more simplified, however, because on LED fans using fan speed control software, you'll notice the lights start to become more dim when you try to slow them down. it's less common to see fans out there that have advanced secondary controls in which you can adjust the speeds without tampering with the power draw features and thus losing the special lighting effects. either way, they aren't very silent, and even the silent fans don't match up to standard case fans, you have to look at hardcore third party manufacturers for "dead silent" case fans.

 

[JimPhelpsMI]

Hi, Different fan connectors on MB are controlled from different temperature sensor. Example: CPU fan connector is controlled by sensor under the Processor and MB fan connnector somewhere on the MB. Only applies to 3 pin fans.
Hope this helps a little, Jim