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Help understanding fan power cables

post #1 of 4
Thread Starter 
I want to power the pump on my H50 from my PSU and not my CPU fan header (the radiator fans are on a controller), while keeping the motherboard's RPM monitoring capability. Can I do this by having a female 3-pin connector with only the black (ground) and yellow (RPM) wires connecting the CPU header to a 3-pin male connector which also has the red (12v) line going to a 4-pin molex connector?

From what I understand it's only the red wire that carries any current so I won't explode my motherboard having just the black and yellow wires plugged into my CPU header and the power coming from my PSU.

Sorry if this is confusing but any help would be appreciated
post #2 of 4
It will work. I'd run the ground from the PSU though and run only a yellow RPM wire to the CPU Fan header.
 
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Work Rig
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i7-2700k @ 4.5GHz  Asus P8Z68-V/Gen3 Asus GTX 1070 Strix OC G.Skill Ripjaws 16GB 
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Crucial M4 128GB + 1TB F3 + Crucial M500 256GB Noctua NH-D15S Windows 10 Pro Cooler Master Novatouch TKL 
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Cooler Master V1000 600T SE Roccat Kone XTD Steel Series 9HD 
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post #3 of 4
As long as you keep the yellow wire on the mother board, you'll have the monitoring. I've rigged fans up like this before, works for me. But be sure not to overload your pump, I'm not sure what voltage they're rated for.
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Timid Beast
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post #4 of 4
Thread Starter 
It says on the corsair tech support forums that you can plug it directly into the PSU using a 3 to 4 pin adapter so I'm going to give it a try.
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