Many thanks !Believe all MacPro's from 2006-2012 use the same dual mini 6-pin connections on the board.
I will return my RX 560 because of the x8 PCie (no benefit).
Is the "SAPPHIRE PULSE Radeon™ RX 580 8GD5" a graphic card natively supported by OSX High Sierra?
I mean she's compatible with my Mac Pro early 2009 (firmware update to 5.1) ?
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