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CPU Cooler fans - plug into MB?

R

Rustynuts

[H]F Junkie
Joined
Feb 6, 2003
Messages
10,346
In earlier days, huge CPU coolers used to fry MB headers if plugged into them. Is this still the case? I've got a hugemongous Coolermaster V10 (two 120mm fans!) going into a Gigabyte EX58-UD5 board. Can this board handle the current? I usually split the fan power wires into a standard molex and plug directly into the PS leads. The yellow speed monitor wire then plugs into the MB by itself for monitoring. Does anyone still do this?

The V10 comes with two leads, one a standard molex which is solely for the TEC unit I believe, and a thin flat 4-wire cable for the MB plug. I assume the 4-wire job is two hots for the fans, a common, and the fan speed signal.
 
Nowadays, motherboards are generally capable of handling whatever fan you plug into them within reason (I would not use anything larger than a 140mm fan). For your V10 cooler, it would actually be a good idea to plug the fan into the mobo since the 4-pin connector means that your fan is a PWM fan, which means that your motherboard will dynamically adjust the fan's speed.
 
My ASUS motherboard manual states:

CPU, chassis power fan connectors support fans" - "for a total of 7 A (84 W max.) at + 12V.

So I hooked up my V10's "flat 4-wire cable" to my motherboard and hooked up the standard molex to my PSU. I then went into my BIOS and enabled the CPU chassis fan control and set its profile to standard.

Before doing anything I'd suggest taking a good look at your motherboard manual because I'm certain it contains all the necessary information.
 
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