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MacPro Mod -No Tray, No Cutting, All PCI solutions for I/O

Joined
Jan 13, 2014
Messages
26
CPU
i5-3340
Graphics
R9 280X
Mac
iMac, MacBook, Mac Pro
Classic Mac
Power Mac
Mobile Phone
iOS
Okay, got the PSU fan working.

Pin layout is
1 = GND
2 = V+ Supply
3 = ?
4 = V+ Control

I breadboarded a simple circuit to allow me to control the fan speed.
psu9.png
It works.
However, the big problem is the fan is NOISY! Really noisy.... like a hurricane.

I tried running the fan at 5 Volts Supply and that lessened the noise a bit, but still a bit noisy. The ideal voltage is about 3.3Volts for the fan to be quiet (and still be spinning), but at that speed it isn't moving much air.

So... I'll have to ditch the MacPro PSU fan and buy an after-market quieter fan.

One thing though, these MacPro fans are tough. I fed it 20Volts Supply and you think it's going to fly. Really LOUD... across the room LOUD. (If you ever had a serious KP on an Apple G5, and the fan revs up really loud, you know what kind of LOUD I'm talking about.)
Hi powerpcg5, good work i love it, and im looking for the sata back plate, where do you get it ?
Thanks
 
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