You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

2012 Mac Pro GPU power supply question regarding 6-pin to 8-pin cable

I have a 2012 Mac Pro 5,1 that I intend to upgrade the GPU to a Sapphire PULSE Radeon RX 570 8Gb GDDR5. The card that is currently installed is the stock ATI Radeon 5870 1GB GDDR5.

I know that the PCI slot supplies 75W and that each of the 6-pin connectors that are hooked up to the 5870 are suppose to carry 75W each. The RX 570 has one 8-pin connector and looks to be rated at 150W.

I don't want to use a single mini 6-pin to 8-pin cable, because even though 150W is the max level for the RX 570 in theory, I'd rather have some wiggle room. I see that they make a two mini 6-pin to single 8-pin cable and am wondering if that would be ok to use. I would assume that it would put less load on each of the mini 6-pin connectors on the logic board.

Mac Pro

Posted on Nov 5, 2022 1:14 PM

Top-ranking reply

Johnb-one

Level 6

9,180 points

Posted on Nov 6, 2022 6:56 AM

Sure, DeathStalker13, that’d be the way to go and what I’d recommend. The absolute max wattage the Mac Pro’s backplane can deliver is around 225 watts, anything less than that should be fine

john b

View in context

2012 Mac Pro GPU power supply question regarding 6-pin to 8-pin cable

Similar questions