Problematic CPU Fan Header

Gigabyte Ga-ep43-ud3l desktop board
February 28, 2011 at 07:45:43
Specs: Windows 7, Q6600 / 8 GB DDR2-6400
After a few hours of troubleshooting, I've been able to determine what I believe to be a problem with the CPU Fan Header on my Gigabyte GA-EP43-UD3L. It is a 4 pin header and when powering on the board outside the case, it does not spin or light up the fan. I have a Zalman 9700. I also tested it with an Intel OEM fan. I pulled out an old ASUS board, and both fans work off that CPU Fan header. If I use the the 3 Pin Pwr Fan header on the Gigabyte board, it also spins and lights the fan,

Since I want to continue this gigabyte board, I'm trying to figure out if there are any ramifications to running the fan off the 3 pin Power Fan header. When I attach it - its the blue wire that is being bypassed. I see that they sell adapters that allow you to connect fans directly to a molex connector Is this a better method? Bottom line - will running this fan off of any other power source other than the CPU header - screw anything up?

Thanks
Frank


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#1
February 28, 2011 at 08:08:44
What makes you think there's a problem? The 4th pin (blue wire) is for the fan controller. If you have a fan with a 4-pin plug & want the fan to run all the time, just change the setting in the BIOS.

http://www.allpinouts.org/index.php...

http://www.intel.com/support/mother...


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#2
February 28, 2011 at 08:14:10
I don't really care if it runs all the time. The issue is that it doesn't run at all from the CPU FAN Header. It only runs from another header off the board. So obviously, the cpu fan header is shot. I'm just wondering if running it off of a different header will screw anything up? Or should I get an adapter an run it off a molex on the PSU.

Thanks
Frank


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#3
February 28, 2011 at 08:16:58
Did you check your fan controller setting in the BIOS?

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#4
February 28, 2011 at 08:38:19
No I haven't yet. I haven't changed anything though. Should I be looking for something in particular? Historically, do individual Fan Headers go bad?

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