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Thread ID: 137944 2014-09-12 07:31:00 40 mm Computer fans johntekuiti (13584) Press F1
Post ID Timestamp Content User
1383799 2014-09-12 07:31:00 Hi Guys,
I have a old 40mm fan which makes a lot of noise when running and going to replace it. The old fan is only two wires red and black. The new fan which I got from the computer shop which they ordered in has 3 wires red, black, yellow. If I connect up the red and black wires as the same as the old fan will the new fan still work or do I have to wire up the yellow as well.

Thanks John.
johntekuiti (13584)
1383800 2014-09-12 09:06:00 This may help (forums.anandtech.com) Red and black should be enough. Red is 12v black is ground. yellow will be RPM which you cant use anyway Speedy Gonzales (78)
1383801 2014-09-14 03:21:00 Yeah just use red\black the same for power. Yellow wire will be RPM readout - you can connect it to a sensor on your motherboard if you have one, otherwise just ignore it. Agent_24 (57)
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