How to fix a broken CPU header?

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Guest

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Hello guys,
Last night my new case arrived via FedEx, a Thermal take V3 black edition. It's a huge upgrade from my old, crappy HP case and has room for lots of fans, and the cooling system is top notch! However, after transferring my board to the new case, my CPU header stopped working. So far, I tried throwing in a different processor and using another fan to no avail. It does work when using a splitter, but the fan noise was too much. I couldn't take it anymore! So, I plugged it in to the system fan header, for now. My question is, how do I go about fixing the CPU 4 pin header without replacing the motherboard?
 
Solution
gdmaclew
The CPU header is different from the other fan headers because it is directly tied to the temperature of the CPU.
If you connect the CPU fan to one of them, the fan cannot follow the CPU temperature.
You can manually adjust the fan speed when connected to a regular fan header but it will not follow the heat curve of the CPU.
The only way to truly be sure that you have a fan that follows the CPU temperature is to have a working CPU fan header.
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G

Guest

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The CPU fan header works when using a splitter, but the fan itself was too noisy for me to bear.
 
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little_me

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May 9, 2015
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From what I understand, the 4 pin CPU-fan header is broken, doesn't work.
Using splitter cable drives the fan at full speed, which works but as noted, noise is a problem.

Since problem isn't related to CPU or FAN (tried with different ones) it's MB/header problem.

The solution?

If the header is physically broken (one of 4 pins is bent, broken, lost) then in theory that could be "fixed" by replacing the header itself, not easy but doable. (provided you know a few things about soldering electronics)
If the header is physically fine, the problem is deeper in the motherboard and... you pretty much lost all chances to fix it without replacing motherboard.
 
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G

Guest

Guest


What would cause the header to suddenly short out? There are no bent, broken or lost pins. Everything seems to be intact.
 
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gdmaclew

gdmaclew

Distinguished
May 20, 2008
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The CPU header is different from the other fan headers because it is directly tied to the temperature of the CPU.
If you connect the CPU fan to one of them, the fan cannot follow the CPU temperature.
You can manually adjust the fan speed when connected to a regular fan header but it will not follow the heat curve of the CPU.
The only way to truly be sure that you have a fan that follows the CPU temperature is to have a working CPU fan header.
 
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Solution
L

little_me

Splendid
May 9, 2015
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I don't know, only possible reasons for that could be either bump/scrape while moving MB to new case or.. standoff on bottom being just in right spot and shorting the 4th pin on the header or... something.

Alternate way to set the fan speed could be to get a fan controller board for front panel 5.25" slot and connect it there, allowing you to change the speed. That way you could still get around replacing motherboard and have variable fan speed
 
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G

Guest

Guest


My Bios setting haven't changed. The original fan that used to be on the header DID work until the case swap.
 
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