The 40mm is only a 5V fan. So do not hook it up to 12V! It also has a plug that will fit a normal fan header on a mobo, but will DESTROY THE MOBO if it is hooked up to it! So clip off the connector and use the wires.
The 80mm is the same as the 40mm as far as the connector goes. It is a regular 12V fan.
The 120mm is a 12V fan. It also has a molex plug on it so you can simply plug it into an open power connector. They are also temp sensing. As the temp rises the fan will speed up. they run whisper quiet at room temp.
40mm $4
80mm $5
120mm $8
Will discount if quantites are purchased. Shipping not included. Shipping will be 2-3 dollars per order depending on where you live. Also if a larger order is placed shipping could be more.
