Need help with Enermax PS!

[optoman]

I have an Enermax 351W Whisper version. DO you have to plug in the three pin header into the mobo in order to have the fan work. When I take it off the mobo the fan in back doesn't spin. My case is running cool with the fan off, but will it ever turn on if the case gets to hot? Does the rear fan have an internal power supply so that if doesn't have to be run off the mobo? TIA

 

[Tates]

If it works with the three pin connector attached to the MB, then I'ld do it. I think the rear fan is temp controlled and may need to interface w/the MB.

 

[Vinny N]

It's temperature control but that's independent of the motherboard.

The 3 pins are simply power, ground, and rpm monitoring.

If you want to monitor the RPMs on that fan to make sure that it's ramping up RPMs as temperature increases then use it.

Personally, I don't care much for RPM measurement. I use an adaptor to connect to a standard 4 pin power connector.

I don't want to worry about burdening the motherboard in the least bit or about the power going to the fan faltering.

 

[optoman]

Thanks for the replys but someone said that they are both powered internally in this thread. Can anyone confirm that they are truelly both powered internally?

 

[Vinny N]

lol. good idea...

I never tried to not plug them in, I'm fairly certain they're not self powered...

I guess I could open my system and find out...hmmm...

 

[Jhhnn]

Depends on which model you have. The newest whisper model powers the rear fan from the motherboard, which allows the motherboard to turn the fan off in some low power modes. The modern standard model has two wires rather than three in the fan harness, allowing the motherboard to simply monitor rpm.

By all means plug it in to the motherboard or power it using an adapter. Or alter the internal wiring to run it in parallel with the larger fan, just like the standard model.