VvWolverinevV
Posts: 119 +0
How to utilize motherboard fan speed control when your fan has the wrong connector
I recently ordered the Vantec TD9238H case fan, appropriately named "Tornado." After it arrived, I soon learned the misleading spec on Newegg "Power Connector: 3/4 Pin" actually means "4-pin connector, with the RPM sensor in a separate 3-pin connector." Since the 4-pin connector is always at 12V, the fan was always at maximum speed, and the "Tornado" was so loud I couldn't even hear my own thoughts. Rather than go through the hassle (and delay) of returning it, I decided to make it work. Here's how (soldering required):
So far, this has been working fine for me. Feel free to reply with any questions/comments
I recently ordered the Vantec TD9238H case fan, appropriately named "Tornado." After it arrived, I soon learned the misleading spec on Newegg "Power Connector: 3/4 Pin" actually means "4-pin connector, with the RPM sensor in a separate 3-pin connector." Since the 4-pin connector is always at 12V, the fan was always at maximum speed, and the "Tornado" was so loud I couldn't even hear my own thoughts. Rather than go through the hassle (and delay) of returning it, I decided to make it work. Here's how (soldering required):
- Obtain a 3-pin connector (for example from a failed fan).
- Solder as follows:
- P1(ground/black) from 3-pin connector to ground from fan connector (black for the standard 4-pin Molex connector)
- P2(12V/red) from 3-pin connector to 12V from fan connector (yellow for the standard 4-pin Molex connector)
- P3(RPM sensor/yellow or white) from the 3-pin connector to RPM sensor directly from fan (usually yellow or white) *Note: this step is not required if your motherboard fan speed control does not use feedback from the fan. This was the case for my Compaq Presario where fan speed is only dependent on CPU usage.*
- Plug the 3-pin connector onto the motherboard fan speed control pins. (The original connector should not be plugged in).
So far, this has been working fine for me. Feel free to reply with any questions/comments