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post #1 of 5 Old 08-10-2014, 12:56 AM - Thread Starter
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Fan Speed indicator

I want to slow down the case fan but have no idea how fast it is going.

HWMonitor displays only the CPU fan speed.

SpeedFan displays only the CPU fan, however it does list “GPU Fan: 0 RPM”. The last time I checked that little fan was working so I don't know why it shows 0 RPM.

But neither one lists or displays the case fan which is a 3-wire fan plugged into the mobo. Any ideas why there is no reading for the case fan speed?
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post #2 of 5 Old 08-10-2014, 06:16 AM
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They make little fan speed controllers that basically have a dial on them to turn down the voltage (speed). Grab one, unplug the fan from its header, plug the fan speed block into the header, then plug fan into fan speed controller output.

It won't tell you the rpm, but you can guess or set it what you want. They are usually turn knobs and analog. Not fancy but it works.

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post #3 of 5 Old 08-10-2014, 04:44 PM - Thread Starter
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Quote:
Originally Posted by Mfusick View Post
They make little fan speed controllers that basically have a dial on them to turn down the voltage (speed). Grab one, unplug the fan from its header, plug the fan speed block into the header, then plug fan into fan speed controller output.

It won't tell you the rpm, but you can guess or set it what you want. They are usually turn knobs and analog. Not fancy but it works.
I've seen those on Newegg. I was at Micro Center yesterday & did ask them about speed controllers but they didn't have any. I should have looked online first because they did show one when I got home. I did put it in the shopping cart & it was available for pickup. Apparently the salesperson was not aware they had it.

Anyway Newegg has this for $7.99 with free shipping. It seems to get pretty decent reviews.
http://www.newegg.com/Product/Produc...-020-_-Product

Since I don't have a speed controller at the moment I thought about powering the case fan with 5V and seeing how it does. Obviously I can check temperatures but figured I'd be able to check fan speed also via software. Unfortunately the programs I've tried don't display data for the case fan.

I have a spare fan & IIRC it has both a 3-pin and a Molex connector. That would be relatively easy to change the Molex pinout & see what happens at 5V. I'll probably try that & see how much the temperature changes between full speed & slow speed.
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post #4 of 5 Old 08-13-2014, 06:17 AM
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For cheap cost worth a try IMO

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post #5 of 5 Old 08-13-2014, 06:33 AM
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You can also try 7 volts.

From Assassin's guide:

My case fans are a little loud. How can I slow them down and make them quieter?
The is pretty easy to do but requires you to reduce the voltage to your fan. Most stock case fans run at 12 volts but can run easily at lower voltages. For instance a 1200rpm fan at 12v will run at 700rpm on 7v. This can be done by powering the fan off a different rail (cable) than normal. Here's how...
Locate a molex connector that is not being used by any of your other hardware:

http://wiki.robotz.com/images/4/48/F...onnector01.png

This is how it normally connects to your case fans:

http://img.photobucket.com/albums/v3...%20mod/12v.jpg

7v rearrangement:

http://img.photobucket.com/albums/v3...n%20mod/7v.jpg

5v rearrangement:

http://img.photobucket.com/albums/v3...n%20mod/5v.jpg

Summary of possible options:

http://www.overclockers.com/forums/a...1&d=1110846598

Did you really need to quote that entire post in your reply?
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