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  #11  
Old 06-24-2020, 06:22 AM
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DetroitT DetroitT is offline
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Default Re: HDX-card, Radeon RX 580 8GB and power consumption

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Originally Posted by stargazer View Post
Are there any Mojave compatible graphics card that only needs one power cable available?
Apple has a list.
Some are not flashed like the AMD Radeon Pro WX7100
1-6pin power
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  #12  
Old 07-08-2020, 09:07 AM
Padje Padje is offline
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Default Re: HDX-card, Radeon RX 580 8GB and power consumption

MSI Radeon 560 Aero ITX 4G

No startup screen. Not flashable as I know, but besides that, works like a charm on a Mac Pro 5.1 with HDX and UAD, all drive bays occupied, 4k screen.
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  #13  
Old 07-22-2020, 07:11 AM
epm epm is offline
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Default Re: HDX-card, Radeon RX 580 8GB and power consumption

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Originally Posted by stargazer View Post
Are there any Mojave compatible graphics card that only needs one power cable available?
As Padje mentioned the MSI Radeon 560 Aero ITX 4G is (imo) the best solution.

4k Support, fully PCI powered.

No startup screen, but Recovery mode works so I don't see any need for flashing. I'd keep your 5770 or whatever mac card you have just in case, but the 560 is a perfect fit for these machines, and can be found for about $170ish.
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  #14  
Old 09-27-2020, 02:03 PM
RossH RossH is offline
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Default Re: HDX-card, Radeon RX 580 8GB and power consumption

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Originally Posted by DetroitT View Post
Hi. I use the 580 mac video card.com flashed
The two mini 6pin pcie power to 8 pin video.
Power split / spliced to avid 4 pin hdx
2-evo ssd’s, 2-10tb spinners
Hdx1
I’ve been using this split 8 yr or so since the
Original 5870 card, 7950 now the 580


Mac video cards also offers a single power cable solution (6 pin to 8 pin)
Hi DetroitT, I've seen you mention your "power split" solution in a couple threads on here. Can you provide more detail on how you did that?
I have a 2012 Mac Pro that I want to upgrade the 5770 to an RX580, but am struggling to figure out the power requirements as I also have a single HDX card. And I don't want to add an external power supply, I'm just trying to get another year out of my system.

Thanks for any info.
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  #15  
Old 09-30-2020, 02:25 PM
Hugh-H Hugh-H is offline
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Default Re: HDX-card, Radeon RX 580 8GB and power consumption

Hello RossH,

For our MP5,1 + RX580 + HDX3 installations initially I wired the harnesses, one MP 6-pin to the RX580, the other MP 6-pin to both the RX580 and the HDX3 harness. The thought in my head was that the RX580 requires high current and the reason most power harnesses are dual-6pin is to allow for the high currents, less voltage drop.

However I did some voltage and current testing and perhaps the dual 6-pin source is advised for high end graphics software but for audio software and video rendering, it's not necessary. So to make it easier for our other users we purchased single 6-pin to 8-pin harnesses for the RX580 installations, and the other 6-pin on the MP is for the HDX3. Works fine.

Here is the link we purchased that works -
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Good luck.
Hugh
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  #16  
Old 10-02-2020, 08:39 AM
RossH RossH is offline
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Default Re: HDX-card, Radeon RX 580 8GB and power consumption

Hi Hugh, thanks for the response.


Which RX580 are you using? The ones I've seen only have one 8 pin power port. I'm planning to get a Sapphire RX580, I guess mostly because it's on Apple's (now archived) list of supported cards.


I do use Adobe Creative Cloud apps on this Mac, so I think I will need both mini 6 pin ports for the single 8 pin connector. I also want to drive at least 3 monitors (can only use two on my 5770) if that matters.



I'll plan to power the HDX card off a SATA port or two. I've contacted Avid support to try and track down the HDX power cable for PC with the Molex connector on it, I don't seem to have the original box anymore. But I haven't heard back just yet. There is a US-based site that sells them online, and there's one from the UK on eBay. Can't find any in Canada.
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