View Full Version : case fans....
11-09-2004, 04:57 PM
Do the fans on my new case plug into the power supply or onto the motherboard?
its a rosewill r114a but it didnt come with any instructions for what wires go where....
and what connects to what
it came with a pin assignment but that looks like a foreign language to me
11-09-2004, 05:02 PM
What kind of plug does the fan have? Usually case fans connect to the motherboard.
11-09-2004, 06:05 PM
Many case fans use the 4-pin connections from the power supply. They will often have a "pass-thru" type connection so the same plug still can supply power to a device (such as a hard drive or optical drive).
If the fan has a small 3-pin connector, it's designed to plug into a motherboard fan header.
11-09-2004, 06:08 PM
Some fans (usually not cheap ones, though) will have both. You plug the 3-pin (female) connector to the mobo and the 4-pin Molex pass through into your PS. The mobo has speed monitoring, in case you want that.
Generally, if I have the choice, I use the big molex connector, since grounded electricity from fans tends be to pretty dirty-not the kind of power I want on my mobo.
11-09-2004, 06:27 PM
the fans have the double 4 pin connectors and the front led's (for power supply and reset) have two holes in them.
i hope i have enough connections on my power supply... lol
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