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and C connector
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J3 connector pinout

Pin
Number
Pin
Name
Description
1,7 V3 +12V
2,8 G3 Ground
3,9 V5 +12V
4,10 G5 Ground
5 G1 Ground
11 V2 +12V
6 V1 +12V
12 G2 Ground

 

It's for most Mac Pros, the problem with the power supplies is that you have to match part of the serial number as well as the part number.

Part number is usually: XXX-XXXX
The serial number is: XXXXXXXXEEEX. The last 3 of 4 letters or numbers is the version number of the PSU. This must match or they don't always work (thanks Apple). It's called the EEE code.

This pinout is for the 980Watt unit.

C connector pinout

Pin
Number
Pin
Name
Description
1,6,7   +3.3V
2   Ground
3,4,9   +5V
5, 10   Ground
8   PSU_ON

Mac Pro 1.6GHz Core 2 Duo (A1186) - Mid 2006 MA356LL/A
Mac Pro 2.0GHz Xeon (A1186) - Mid 2006 MA356LL/A
Mac Pro 2.26GHz Xeon (A1289) - Early 2009 MB535LL/A
Mac Pro 2.66GHz Xeon (A1186) - Mid 2006 MA356LL/A
Mac Pro 2.66GHz Xeon (A1289) - Early 2009 MB871LL/A
Mac Pro 2.8GHz Xeon (A1186) - Early 2008 MA970LL/A
Mac Pro 3.0GHz Xeon (A1186) - Mid 2006 MA356LL/A GS177101
Mac Pro 3.0GHz Xeon (A1186) - Mid 2007

12 pin Mac Pro PSU J3 схематический вид разъема
Разъем 12 pin Mac Pro PSU J3
at the cable
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