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Windows 7: PC Case rear fan


29 Mar 2010   #1

Vista/Windows 7
 
 
PC Case rear fan

I just finished building my new PC and for the rear fan on the back I used my old fan from my old machine. After turning my machine on the fan blows at full force and doesn't stop and its really noisy...it sounds like a vacuum cleaner or a plane taking off lol
I disconnect the fan and the noise stops...is there a way to control the speed or should I get a new fan altogether?

I was looking at this one from ebyer: Antec 80mm Smartcool Thermally Controlled Case Fan - Ebuyer

My System SpecsSystem Spec
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29 Mar 2010   #2

Win7 x64 Ultimate SP1
 
 

Are you connecting the fan to one of the fan connections on the mother board?
My System SpecsSystem Spec
29 Mar 2010   #3

Windows 8.1 Pro RTM x64
 
 

Hi burtie,

What size rear fan can your case actually accommodate? If it can take a 92mm or a 120mm fan then use one of that size. Its larger size means that to shift the same amount of air as an 80mm one, it doesn't need to spin as fast. This reduces the noise.
My System SpecsSystem Spec
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29 Mar 2010   #4

Vista/Windows 7
 
 

I plugged it in to SYS_FAN header on the mobo. My case can only accommodate 80mm.
My System SpecsSystem Spec
29 Mar 2010   #5

Win7 x64 Ultimate SP1
 
 

burtie, most mobo's control the fan speed based on CPU or chip temperature.
Try running 'speedfan". and see if you can set the speed settings.

Ken
My System SpecsSystem Spec
29 Mar 2010   #6

Windows 7 Professional x64
 
 

My BIOS has a place to change the fan speed. Maybe that's worth looking into.
My System SpecsSystem Spec
29 Mar 2010   #7

Win7 x64 Ultimate SP1
 
 

Burtie, it might helpful if you filled it your system specs os we know which mobo you using.

Ken
My System SpecsSystem Spec
29 Mar 2010   #8

7 x64 | 7 x64
 
 

Just thinking the SYS_FAN header is 4 pin but if the fan is 3 pin could force it to run full speed. You might need a 3rd party controler that feeds off a molex. Newegg has jazz like that.
My System SpecsSystem Spec
29 Mar 2010   #9

Vista/Windows 7
 
 

I have a Gigabyte S-series motherboard GA-G41M-ES2L
GA-G41M-ES2L (rev. 1.0) - GIGABYTE - Product - Motherboard - Specification

The manual says it has a 4 pin CPU fan header and a 3 pin system fan header.

Would I need a connector like this if I were to buy a 4 pin fan? 4-pin Molex to 3-Pin Female Socket Cable Adapter Sleeved [4FAN3PIN] : Performance-PCs.com, ... sleeve it and they will come

I was also thinking maybe of getting a quiet low noise fan. Would anyone have any suggestions? It doesn't have to be powerful just enough to vent the warm air from the back. I also have room at the front for another small fan and was thinking I could use another quiet one to suck cold air in, would that be more beneficial? How would I connect 2 fans if I only have one header for a system fan?

Thanks for your help
My System SpecsSystem Spec
29 Mar 2010   #10

XP Pro SP3 X86 / Win7 Pro X86
 
 

Quote   Quote: Originally Posted by burtie View Post
I was also thinking maybe of getting a quiet low noise fan. Would anyone have any suggestions? It doesn't have to be powerful just enough to vent the warm air from the back. I also have room at the front for another small fan and was thinking I could use another quiet one to suck cold air in, would that be more beneficial? How would I connect 2 fans if I only have one header for a system fan?

Thanks for your help
All fans make noise... the question is how much....

Ball bearing fans make more noise than sleeve bearings.
Bigger fans spin slower and make less noise.
Older fans often have wear in their bearings and make more noise.

Look for fans with "hydro dynamic" bearings. The shaft floats on a layer of oil inside a nylon bushing and the only thing you hear is airflow. Some of the better ones are these...

Newegg.ca - GELID Solutions Ltd.,case fan.

Newegg.ca - Rexus,case fan

I've always had good luck with the Rexus. They used to be Panaflo and I still have a couple of Panflo fans that have been running day and night for nearly 10 years.

Another trick you can use, if you feel like a little DIY, is to put a 10ohm 2 watt resistor in series with the red lead of the fan... a quick snip, a little solder, some heat shrink (or tape) and you have a fan spinning about 75% of full speed.
My System SpecsSystem Spec
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 PC Case rear fan




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