quieting a loud case fan
I bought a 120mm intake fan which came with a molex connector.
It's very loud. If I use a molex -> 3 pin mb connector, can I slow it down with speedfan?
I have a bunch of unused motherboard chassis fan ports.
No reason you can't as long as you have it hooked up to a "FAN_x" mobo connector and not a "PWR" connector. You can check your mobos manual to see which ones are controllable and which arent.
OR, check this out.
Guide to the 7v Fan Mod - Overclockers Forums
You can't slow down your fan with the molex adapter on your power supply. Try connecting it to your motherboard fan ports and control it with speedfan. Alternatively, you can get a fan controller and your problem will be solved.
I usually reference this guide.
Get 12V, 7V or 5V for your Fans | silentpcreview.com
Much better explanation. Switch isn't necessary. All you need is a thin flat tipped object to flatten out the molex tip when taking them out and to bend the flanges back out when plugging the wires back into the molex plug. Just make sure the wires are secure in the molex plug
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