Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: How to slow down fan speed?

10 Nov 2011   #1
Golden
Microsoft MVP

Windows 7 Ult. x64
 
 
How to slow down fan speed?

G'day hardware geeks.....

My Thermaltake Element S case has two inbuilt 22cm fans that plug directly into the PSU. They are a little bit noisy, and I was looking to lower their RPM to take the edge off the whir.

Initially, I was considering purchasing a dedicated fan control to fit into a spare 5.25" drive bay, but a colleague suggested I might try and "cross-over" the yellow 6v cable from the PSU with the red 12v cable to the fan, to halve the RPM of the fan.

However, when I opened the case and examined the psu ---> fan connection, I noticed it already appears to be crossed-over as in the photo below (apologies for the poor quality).

The photo shows the yellow cable from the PSU on the left, connected to the red cable from the fan on the right. Thus, the fan is already running at half its RPM? Am I correct?

Regards,
Golden




Attached Thumbnails
-conn.jpg  
My System SpecsSystem Spec
.

10 Nov 2011   #2
alexdagr8est

Windows 7 Ultimate x64
 
 

this is not necessarily the case for the molex connection - the fan only needs 2 connectors for it to have power - as is the case with all 5 of my fans buddy. - I would recommend getting a molex to silent cable http://www.erodov.com/forums/imageho...f4f8e4796f.jpg
it looks like that pic - you can then also daisy chain your fans along with connecting them to a fan controller bay (pretty cheap for us aussies and no postage sometimes) but remember that reducing fan speed = increased heat...
My System SpecsSystem Spec
10 Nov 2011   #3
Dwarf

Windows 8.1 Pro RTM x64
 
 

No, the fan is running at 12V since the standard colour coding of power cables from the PSU is Yellow 12V, Red 5V, and Black 0V (ground). To make the fan run slower (approximately 45% in comparison), you need to arrange it so that the red lead from the fan is connected to the red lead at the molex connector. That way, the fan will be fed with just 5V as opposed to 12V.
My System SpecsSystem Spec
.


10 Nov 2011   #4
Golden
Microsoft MVP

Windows 7 Ult. x64
 
 

Golden, repeat after me : "You are a muppet. Read your manual where it clearly states yellow = 12v".

Thanks Dwarf, I crossed over red to red with an intermediary molex, therby connecting 5v to 5v, and finally I can here myself think clearly. The silence is defeaning.

All is good. Fans running slower and temperatures actually seem to be a fraction cooler......

Regards,
Golden
My System SpecsSystem Spec
10 Nov 2011   #5
Dave76

Microsoft Community Contributor Award Recipient

Windows 7 Ult x64 - SP1/ Windows 8 Pro x64
 
 

to both.

Good suggestions.

Edit:
Glad to hear (pun intended) you got it sorted
My System SpecsSystem Spec
10 Nov 2011   #6
badger906

Windows 7 Ultimate x64, & Mac OS X 10.9.2
 
 

Could always solder a resistor along the cable, that will lower the voltage.

Or do as I did for my media pc, I stole a reostat from an old computer cd drive (volume wheel)
I then wired that into a box, that my fans connected to, was only about 2cmx1cm and fitted behind mobo tray.
That way I could vary the fan speed if I ever needed.

My System SpecsSystem Spec
Reply

 How to slow down fan speed?




Thread Tools





Similar help and support threads
Thread Forum
How do I change CD-ROM speed? (Transfer speed is extremely slow)
Hello guys! So I bought this kick-ass laptop from MSI. It is pretty good. These are the specs (in case they aid in finding a solution to my problem): Name: MSI WorkStation Series GT60 2OKWS-674US OS: Windows 7 Professional 64 bit CPU: 2.7 GHz Intel Core i7-4800MQ
Hardware & Devices
Slow speed, fast speed, slow speed.
Recently moved house and had installed my internet today, the exact same setup. Right now the only difference with this setup is that the router is plugged into my laptop, and if anything, it's closer to my computer than it was in the previous house. My problem is that it randomly goes slow...
Network & Sharing
fast download speed but browseing speed slow.
hallo i have a problem last 1 week.my downloas speed well..but browseing speed slow.i playing online games.watch movie. its soo low its too pain full.i cant under stand why?..i am from srilanka.internet line ADSL.. prolink router..512KB/s line..plz help me.
Network & Sharing
What's with the slow speed?!
Hey, my computer has suddenly gotten super, super slow after restarting... I have a 3.5GHz OC and 4GB RAM so I would think it would be quite fast. Well, it was untill the restart. The disk activity LED is constantly on now. :cry: Logging in takes alot more time aswell... Can anyone tell me...
Performance & Maintenance
VERY slow LAN Speed
Hello, I have speed issues when working with files on the LAN network. They open and save much much slower than XP. On the other hand the ADSL internet connection is fine and running at full speed. What is the problem? The computer is brand new i7 2600k + 16GB ram and ASUS P8P67 motherboard...
Network & Sharing
Slow DL speed
My upload speeds seem fine in Windows 7, but when I'm downloading a game from Steam, where speeds used to be 400-700KB/s, speeds are now getting no higher than 50-100 KB/s. Is there anything I can do? Do I need a driver for something?
Network & Sharing

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 05:10.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App