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The Early 2009 Mac Pro—also known as the Mac Pro 4,1—introduced Intel's Nehalem architecture to Apple's line of professional desktop computers in March 2009. The Mac Pro 5,1 used the same interior design but received further CPU updates in 2010 and 2012.

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SATA Connection Power Question

How much power is generated from the SATA connections on the 2009 Mac Pro? I want to see if I can power a pcie card.

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Per the spec you have three volatages

  • 3.3 V - Orange wires
  • 5.0 V - Red Wires
  • 12 V - Yellow Wires
  • Ground - Black Wires

4.5 Amps max (54 Watts) per logic board/power supply connection.

I personally don’t like pressing a sustained load more than 3 Amps per drop. I also like to disperse the load across different rail lines if the power supply offers it.

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2 Comments:

Hi Dan,

Thanks for your response. I’m trying to figure out where I can get power for this card. The specs say the theoretical maximum power consumption of the card is 40w/136.5 BTU. Would you recommend that I possibly try to find a secondary auxiliary source as opposed to trying to use the SATA connection?

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First, Are you sure you have the needed drivers for it? Many of the newer cards won't work in this older Mac Pro. The spec sheet max power consumption is the worse case. Are you expecting to push the system to the wall? I hope not!

What are you planing on using your system for?

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