System fans connected to a Gigabyte Z77-D3H motherboard do not increase in speed

Posted by Andrew on Super User See other posts from Super User or by Andrew
Published on 2012-10-22T02:52:44Z Indexed on 2012/10/24 5:12 UTC
Read the original article Hit count: 482

Filed under:

fan

|

gigabyte

The motherboard (Gigabyte Z77-D3H) controls my 3-pin CPU fan just fine. My system fans are a 3-pin fan (plugged into SYS_FAN1), and a 4-pin fan plugged into SYS_FAN3. All 3 of the system fan headers are 4-pin, but the user manual states that SYS_FAN1 is really a 3-pin header (that it can control the speed of a 3-pin fan) and the 4th pin is just a reserve. All my fans have a max RPM of 2000.

Normally, all the fans run around 1000 RPMs when I'm not doing anything intensive. This proves that the motherboard can set the speed. However,when I run Folding@Home and my temperatures increase (around 70C) only the CPU fan increases to around 2000 RPMs. The system fans stay around 1000 RPMs. Through the BIOS I am able to disable the system fan control and the system fans then run at max RPMs (meaning the motherboard was doing something).

I've updated the BIOS to the latest version and tried out Speedfan, but neither helped my situation. What I'd like is for the system fans to ramp up their RPMs as needed. Any thoughts?

Tl;dr: My system (case) fans, but not my CPU fan, are always stuck around 1000 RPMs out of 2000 no matter the temperature.

© Super User or respective owner

Related posts about fan

Replacing stock Core 2 Duo heatsink fan (just the fan really) with a Dell CPU fan

as seen on Super User - Search for 'Super User'
My old heatsink fan broke and I'm trying to reconnect its plugs to a new fan. My Dell CPU fan has some custom Dell plug. I snipped the old fan's wire in half and kept the plug on the end of it. I want to connect it to the Dell fan wire to the plug. The motherboard is a P5Q-e, the stock Core 2 Duo… >>> More
Problems with chip fan and CPU fan

as seen on Super User - Search for 'Super User'
I have a five-year-old ASUS motherboard that has been working fine for me for years, until I attempted to power it on yesterday and got a CPU fan speed and chip fan speed warning. Cracking open the case and powering the computer on, I can see the chip fan working, but it appears to be hitting something… >>> More
Lenovo Thinkpad L430 overheating due to fan problems

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
This is the same question as Fan not working on thinkpad L430, laptop overheating, but that question has been marked as a duplicate, which it is not, and I cannot reopen it. I'm having problems controlling the fan of my Lenovo Thinkpad L430. The fan doesn't start. Without any fan control installed… >>> More
Fan not working on thinkpad L430, laptop overheating

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I'm having problems controlling the fan of my Lenovo Thinkpad L430. The fan doesn't start. Without any fan control installed the fan just doesn't run. If I run stress, it does run a little, but it's nowhere near the speed it should be. After a while, the laptop just overheats and stops. I Tried to… >>> More
Speed Fan - low fan speed can burn cpu ?

as seen on Super User - Search for 'Super User'
As i can see, with this software you can set the fan speed. So, if you set it to low, theCPU temperature will grow really high and it can burn in likely 1 hour - is this possible or not and why ? Thanks. >>> More

Related posts about gigabyte

Gigabyte GA-P55A-UD4P won't boot from USB drive with RAID enabled

as seen on Super User - Search for 'Super User'
I've got a Windows 7 installation image on my USB hard drive, which is set up to be bootable. I know it works because I've used it on several computers, and it works on the computer I'm trying to install as long as the RAID controller is disabled. However, when I enable the RAID controller and attempt… >>> More
Terabytes of Storage for Pennies a Gigabyte

as seen on Internet.com - Search for 'Internet.com'
One online backup provider took a hard look at data storage costs and decided to build its own storage servers for just pennies a gigabyte. >>> More
Setting up a software access point on Gigabyte GN-WPKG x64

as seen on Super User - Search for 'Super User'
I'm using a Gigabyte GN-WPKG card on Windows 7 64-bit and was thinking it would be good to turn it into a wireless AP (I have a wired internet connection). Connectify, which would normally be the solution, says it's not compatible. There are instructions for setting up an AP, but they seem to be… >>> More
Gigabyte Onboard graphics card heating up and then crashing

as seen on Super User - Search for 'Super User'
5 minutes after I turn on my PC the onboard graphics card is usually over 80° celsius and then crashes (random colors on screen, only way to get out is to just plug out the pc). I haven't installed any new drivers or added/changed hardware recently Everything went fine until yesterday What should… >>> More
Using sed for introducing newline after each > in a +1 gigabyte large one-line text file

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a giant text file (about 1,5 gigabyte) with xml data in it. All text in the file is on a single line, and attempting to open it in any text editor (even the ones mentioned in this thread: http://stackoverflow.com/questions/159521/text-editor-to-open-big-giant-huge-large-text-files ) either… >>> More