Help With Hooking Up Case Fans Properly

[Doo-Doo-Draws]

Guys,

the directions for hooking up my case fans have me a bit confused, and concerned. The directions for installing the PWM hub says to connect it's 4-pin cable to the motherboard's 4-pin "CPU_Fan" connector. But this is where I have the CPU heatsink fan plugged in to. There are other 4-pin fan locations to plug in to, just not sure which I should use.

Please see the following screen shots with directions and tell me what I should do. I don't want to fudge something up.

Thanks in advance!

You may have to click on them to view a larger version.

 

[Puck]

Do you happen to have more than one CPU_fan connector on your mobo?

 

[katiekitsune]

attach it to CPU_OPT it has the same layout as CPU_FAN so it should have a true pwm signal

 

[Doo-Doo-Draws]

Do you happen to have more than one CPU_fan connector on your mobo?

Yes. The screen shots show all the available fan locations.

attach it to CPU_OPT it has the same layout as CPU_FAN so it should have a true pwm signal

This is what I am trying to figure out.

I really appreciate your time guys. Just wanting to hook up to what will give me the best control (results).

Would it even be best if I just bypass the case PWM hub and connect the fans directly to the motherboard, that is if the cables will reach?

 

[katiekitsune]

if you are using pwm fans they connect them to the chas_fan headers but if you are using 3pin fans then use the hub (it will regulate them better)

 

[Doo-Doo-Draws]

if you are using pwm fans they connect them to the chas_fan headers but if you are using 3pin fans then use the hub (it will regulate them better)

Yes, I just realized that. The 2 case fans are 3-pin fans and the cable coming from the PWM hub is 4-pin. So, I assume using the PWM hub would result in better control over the fans?

 

[katiekitsune]

im not completely up to speed on how pwm hubs work and if hooking up a 4 pin to it makes a difference or not but it should work as a fan controller for any 3pin fan as long as they arent too different from each other.

 

[Puck]

Try running a quick test in the bios to find out if the CPU_OPT is a true 12v pwm signal.

+ Plug the hub into CPU_OPT and plug a case fan into slot 1 because that's the only one that reports speeds.

+ The case fan should have a max RPM at 12 V. I'm assuming here that your case fans are rated for 12 V.

+ In the hardware management or whatever it might be called, there should be a way to see the RPM of the fan.

+ If the RPM is close to the max rated RPM of the case fan at 12 V you should be set.