Does CPU fan need power connector?

Legend · 23 Jan 2007 at 23:26

I've just replaced the Tuniq standard fan with a Scythe S-Flex. Does it need to be connected to a 4-pin molex connector? The Tuniq fan wasn't and didn't have the option, but the Scythe has the connector. Shoud I connect it, or does it make no difference?

:confused:

Legend · 24 Jan 2007 at 10:10

Anyone know? :confused:

TC1 · 24 Jan 2007 at 10:13

If it has the ordinary 3 pin then just use that. No need for the 4 pin then.

Legend · 24 Jan 2007 at 10:20

What is the point of the 4-pin molex connector generally then? Should any fan that has a 3-pin connector just go straight into an available 'aux fan' motherboard connection without the need for the molex connection? Is it an either/or situation rather than a need for both? I wondered if it affected the fan speed or something.

:confused:

TC1 · 24 Jan 2007 at 10:33

Some people will want to use the fan as a case fan or something else so it is an option to either use the 3 pin on the mobo or a 4pin molex. Doesn't really matter. Just with the 3pin it can sometimes be monitored by software.

Van Diemen · 24 Jan 2007 at 10:40

You use 1 of the 2, either 3 pin or molex.

Some mobos have lots of 3 pin connectors & some only have 1 or 2.
the length of wires is a big factor, you may not be able to reach the mobo 3 pin connector therefore you use the molex.

silversurfer · 24 Jan 2007 at 11:53

Check the fan does not draw more power then the motherboard can supply or you will burn out the fan header. Molex is generally designed for more powerfull fans