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Discussion in 'Mac Pro' started by applefanboy4739, Sep 25, 2011.
just wondering if I could buy a second one and put it in?
Yes, you could.
Check here:- http://forums.macrumors.com/showthread.php?t=1076970&highlight=5870+two
It won't work without doing a mod to provide power.
This guy made it work without the mod. http://www.youtube.com/watch?v=lMiAgsr8m9M
Yes you can. You'll need some molex cables to run power from the second optical drive bay to the card, however.
I'm doing it in my 2006 Mac Pro with a 5870 and an 4870.
Yes but no Crossfire on OSX as far as I know
If it were me, I'd play it safe with a PSU mod in the unused optical bay. Apple doesn't publish power rail specs for their PSUs, so to me, it's a shot in the dark over the long term. I would be worried about over-stressing the Molex feed.
I would be worried about heat with those two 5870's. What is apples next card they are going to up in there?