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Connecting Power PMAC CPU Fan
#1
Attached is a document instructing on how to route wires and connect the Power PMAC CPU cooling fan.


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.pdf   Connecting Power PMAC Fan.pdf (Size: 386.53 KB / Downloads: 84)
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#2
Could you supply the voltage input specifications for the CPU fan? In the above document you connect GND to +5V and Power to +15V. This means the fan is a 10V fan or a 12V fan?
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#3
(09-06-2012, 12:17 AM)bradp Wrote: Could you supply the voltage input specifications for the CPU fan? In the above document you connect GND to +5V and Power to +15V. This means the fan is a 10V fan or a 12V fan?

I checked one of ours. The fan is a 12V Sunon, and it's a whiny little thing. My guess is that with the available power, running it 2 volts under was preferable to running it 3 volts over the rated voltage.
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#4
Jeff - Your surmise is correct that we are running a 12V fan off of a 10V net supply because that is what is available. There is not good availability of 15V fans, and running a 12V fan at 15V could lead to early failure.
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