Where to connect? - Techist - Tech Forum

Go Back   Techist - Tech Forum > Computer Hardware > Overclocking and Modding > Cooling
Click Here to Login
Closed Thread
 
Thread Tools Display Modes
 
Old 05-22-2010, 05:15 PM   #1 (permalink)
True Techie
 
Join Date: Jan 2010
Posts: 142
Default Where to connect?

Where do you connect your case fans? Is it better to connect them to the PSU or to the mobo?
__________________

deathville is offline  
Old 05-22-2010, 05:32 PM   #2 (permalink)
Master Techie
 
Alvin.C's Avatar
 
Join Date: Jun 2004
Location: United Kingdom
Posts: 2,580
Default Re: Where to connect?

Hi,

Depends on what you're trying to achieve. But in most cases, the motherboard fan connectors first, since they can control the speed of the fans according to temperatures monitored by system sensors.
__________________

__________________
Alvin.C
linkedin.com/in/alvinwkchan

|Gaming PC| |Dell Latitude E7250| |Macbook Air 13" (Mid 2013)|
|Windows 10 Pro (x64)| |Intel Core i5-6600 @ 3.3 GHz| |MSI NVIDIA GeForce GTX 1080 Gaming X| |Noctua NH-D15S CPU Cooler| |Gigabyte GA-Z170MX-GAMING 5 mATX Motherboard| |Samsung 840 Pro 256GB SSD| |Corsair Vengeance LPX 16GB DDR4-SDRAM| |OCZ ModXStream Pro 700W Modular PSU| |NZXT Vulcan Micro ATX Case|
Alvin.C is offline  
Old 05-22-2010, 06:10 PM   #3 (permalink)
 
Join Date: Nov 2006
Location: Illinois, USA
Posts: 2,363
Default Re: Where to connect?

I would use the motherboard's fan ports if possible, usually they are monitored and have speed control. However, some fans (like the ones in the Antec Nine Hundred) do not have the motherboard connector nor do they have the third sensor wire (some fans have a motherboard connector but no third wire, the third wire is used for detecting fan speed). If your fan has a motherboard connector and a third wire you should definitely connect it to the motherboard, as you will be able to read the fan's RPM as well as control its speed (not all motherboard fan ports have this functionality, especially when you have many connectors on one board sometimes only one or two of them have speed control).

Another option is to buy/build a fan controller. If your motherboard doesn't have controllable fan speed ports you can get a front panel that has multiple channels to control the speed of case fans. This isn't a feedback system (you can't have it turn the fans higher when the sensors heat up) but you can make your PC quieter.

If you're good with electronics you can take it one step further and build a custom fan controller using a programmable microcontroller chip. This type of chip connects to your PC's serial port so you could write a feedback program to control the fans from PC sensors. I designed a fan controller this way that also controlled the LED color.
__________________

CalcProgrammer1 is offline  
Old 05-22-2010, 08:09 PM   #4 (permalink)
Mod Emeritus
 
Puddle Jumper's Avatar
 
Join Date: Oct 2007
Posts: 4,286
Default Re: Where to connect?

I connect them to the psu directly since I want them to constantly run at full speed.
__________________

AMD Phenom II x4 955 Black Edition : Asus M4A89GTD PRO : Corsair 550VX
G.SKILL Ripjaws 4x2gb DDR3 1600 : MSI Geforce GTX 770 2gb : Antec 300
OCZ Agility 2 60gb SSD (OS) : SanDisk Ultra 120gb SSD (Apps) : Crucial M500 240gb (Steam) : Win 8.1 Pro 64bit
2x Samsung 2494LW & 1x Dell U2312HM Eyefinity

Lenovo ThinkPad X220 : Core i5 2410M : 12.5" 1366x768 IPS LED display : Intel 320 Series 120gb SSD

Samsung Galaxy Note 3 stock 4.3 : Nexus 7 2 stock 4.4

Puddle Jumper is offline  
Old 05-23-2010, 01:13 AM   #5 (permalink)
 
Join Date: Nov 2006
Location: Illinois, USA
Posts: 2,363
Default Re: Where to connect?

Connecting directly to PSU works as long as your fans aren't loud, I bought a Masscool 120mm fan and it is LOUD at full speed, without any extra channels on the motherboard I built my fan controller for it. Running it about 25% or less moves plenty of air without getting loud (fan runs ~1200RPM while it runs 2000RPM full power).
__________________

CalcProgrammer1 is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Internet connection sharing behind a router KSoD Computer Networking and Internet Hardware 8 03-01-2016 11:32 AM
Who's hungry? Burn Folding @ Home 426 04-07-2010 04:50 PM
F@H GPU 6.23 is saying it can't download updates ? -RockMan- Folding @ Home 15 02-14-2010 10:50 AM
Unable to connect - via WiFi bl00dy Computer Networking and Internet Hardware 6 01-13-2010 09:11 AM
New pc components, formatted harddrive and won't connect tried all I know: IGeMex Computer Networking and Internet Hardware 3 08-13-2007 03:30 PM



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 06:46 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.