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Prince134

macrumors 6502
Original poster
Aug 17, 2010
338
153
Your Mac Pro in almost 10 years.
Still the king of Mac.

2 x AMD Vega 64 8gb

Luxball dual card score: 57918.
single card score: 28948.
 

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Prince134

macrumors 6502
Original poster
Aug 17, 2010
338
153
Internal power only. The main power is sufficient to support dual vega 64. However, you can't use the dual 6pin power from PCB. Detail is here: Ultimate Mac Pro 5,1 Mod for Triple Titan X.

https://forums.macrumors.com/threads/ultimate-mac-pro-5-1-mod-for-triple-titan-x.2043646/

In that thread, Post no.4, 6th photo shows the +12V and GND soldered 2leads to my dual vega 64 cards' power source through the EVGA PowerLink.

The xbox power enclosure is not necessary to run only these two cards.
 
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Pval

macrumors member
Jan 7, 2008
97
66
Holland
Gotta tune those Vega's ;)
 

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Prince134

macrumors 6502
Original poster
Aug 17, 2010
338
153
Oh, that could break the bios that we just flashed onto for fan behavior. Right? Then I might just skip. Right now the fan is quiet. 0 db while browsing web pages.
 

h9826790

macrumors P6
Apr 3, 2014
16,615
8,547
Hong Kong
Oh, that could break the bios that we just flashed onto for fan behavior. Right? Then I might just skip. Right now the fan is quiet. 0 db while browsing web pages.

AFAIK, this is actually one of the method to fix the fan issue. But yes, it can also break the fan profile.

Anyway, IMO, if you have time, worth to try and learn this technique. Just make sure you know how to revert / restore the kext. Then nothing to worry about.

One main benefit is this technique can undervolt the card, make it run even quieter / cooler. So, even no plan to OC, may still worth to have a look. Especially for dual GPU config.
 
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Prince134

macrumors 6502
Original poster
Aug 17, 2010
338
153
Thanks, I think I overlooked almost a year for that thread until a bios provided for quiet fan behavior recently.
 
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