I've recently built a new PC and I've got everything working apart from the 2 case fans. The case fans wires are both molex that are attracted. I got a molex to 4 pin and plugged it into the cha_fan on the motherboard but it didn't seem to work. I read around and found out that they should probably to plugged into the power supply. What cable do I need? I have no 6 pin gpu left on my power supply, only got 2 8pin gpu sockets. What's the opposite of a molex? The the 2 pins plug into? Thanks, sorry if it was confusing.
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Support with my case fans
- Thread starter Tyler_LFC
- Start date
What power supply do you have? Is it a modular one or are all the cables permanently attached? My guess is modular or you would have found the proper molex plug already. It seems very unlikely that despite their obsolescence, a new power supply wouldn't have come with at least one molex connector line for just this purpose. Fans are about the only thing left that still use molex.
The molex to 4 pin adapter should have worked though. Is it possible that the chassis fan is turned off in the bios? I don't think I've ever seen that option in a bios, but I'm no expert on what is out there as I've only owned Asus boards and one evga.
The molex to 4 pin adapter should have worked though. Is it possible that the chassis fan is turned off in the bios? I don't think I've ever seen that option in a bios, but I'm no expert on what is out there as I've only owned Asus boards and one evga.
- Thread Starter
- #6
There is one, but it go's to a 4 pin which I tried plugging it into cha_fan but it hasn't worked! I checked the BIOS and all fans are full on. Should they even be plugged into the motherboard or should they be plugged into the power supply?
Please tell me you didn't plug the floppy molex into a fan header?
- Thread Starter
- #13
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- Thread Starter
- #15
Yes, I'm on a computer systems course at college. I can't see why it's not working. Should I try getting a cable to plug the fans into the power supply?
Tyler can you please up load some pic of your wiring, especially the connections. Unless I'm not understanding what you're saying you may be making a huge mistake. Without actually seeing what you're working with makes it very difficult to visualize what's connected where.
These images may help. NOTICE The Floppy drive connector is different that the 4 pin fan connector.
EDIT: The 4 pin Molex Large is the same connector but adds an additional ground(Black) and a 12v(Yellow) wire. (Yellow/Black/Black/Red)
These images may help. NOTICE The Floppy drive connector is different that the 4 pin fan connector.
EDIT: The 4 pin Molex Large is the same connector but adds an additional ground(Black) and a 12v(Yellow) wire. (Yellow/Black/Black/Red)
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I was afraid of that. The black adapter you're using is for a floppy drive, not a motherboard fan header. Notice the guide bar near the 3rd pin. You should be plugging the 4 pin Molex large directly into another large molex straight from the PSU. The motherboard will not control these fans and they will run at full speed.
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