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I need help setting up two fans to my Motherboard or somewhere.

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June 14, 2013 9:39:45 PM

Hi, I just bought two Rockefish 120mm fans. They have a 4 pin connector on the end but I tried hooking them into the sys fan spot on my Gigabyte GA-78LMT-USB3 but they won't work at all. I'm trying to use these on the top of my computer as exhaust because I have 2 blowing air in on the side already.
June 14, 2013 9:44:50 PM

On that motherboard I see one 4 pin header for SYS_FAN and one 4 pin header for CPU_FAN. One fan should work using the SYS_FAN header. Alternatively, you can get a 12v adapter and connect it directly to the power supply.
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June 14, 2013 9:46:35 PM

Pinhedd said:
On that motherboard I see one 4 pin header for SYS_FAN and one 4 pin header for CPU_FAN. One fan should work using the SYS_FAN header. Alternatively, you can get a 12v adapter and connect it directly to the power supply.


I have the one fan pluged into the SYS_FAN spot but it doesn't work.
Also I don't have a modular power supply so will that limit me at all with plugging it in there?
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June 14, 2013 11:00:36 PM

Shawn Kelley said:
Pinhedd said:
On that motherboard I see one 4 pin header for SYS_FAN and one 4 pin header for CPU_FAN. One fan should work using the SYS_FAN header. Alternatively, you can get a 12v adapter and connect it directly to the power supply.


I have the one fan pluged into the SYS_FAN spot but it doesn't work.
Also I don't have a modular power supply so will that limit me at all with plugging it in there?


All PSUs have a few MOLEX connectors. There are fan adapters galore which split off of these. Just take a look at your local PC shop
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June 14, 2013 11:41:25 PM

Pinhedd said:
On that motherboard I see one 4 pin header for SYS_FAN and one 4 pin header for CPU_FAN. One fan should work using the SYS_FAN header. Alternatively, you can get a 12v adapter and connect it directly to the power supply.


Pinhedd said:
Shawn Kelley said:
Pinhedd said:
On that motherboard I see one 4 pin header for SYS_FAN and one 4 pin header for CPU_FAN. One fan should work using the SYS_FAN header. Alternatively, you can get a 12v adapter and connect it directly to the power supply.


I have the one fan pluged into the SYS_FAN spot but it doesn't work.
Also I don't have a modular power supply so will that limit me at all with plugging it in there?


All PSUs have a few MOLEX connectors. There are fan adapters galore which split off of these. Just take a look at your local PC shop


I don't believe the fans connect into molex. If they do can you link me on how to connect them? Sorry, this is really hard for me to do, don't normally work with fans.
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June 14, 2013 11:44:28 PM

No a 4 pin wont connect to a Molex, that is why you need a 4 pin to Molex adapter.
http://www.frozencpu.com/search.html?mv_profile=keyword...

As for the 4 pin on the MoBop, did you enable the header in the BIOS ? When you install aftermarket fans, the MoBo may have a min rpm setting so if ya fan has a lower RPM, it will alarm.
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June 14, 2013 11:53:00 PM

JackNaylorPE said:
No a 4 pin wont connect to a Molex, that is why you need a 4 pin to Molex adapter.
http://www.frozencpu.com/search.html?mv_profile=keyword...

As for the 4 pin on the MoBop, did you enable the header in the BIOS ? When you install aftermarket fans, the MoBo may have a min rpm setting so if ya fan has a lower RPM, it will alarm.


Where in the BIOS would this be?
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