Mac Pro 3 displays with 5870

[WRP]

So I did some searching and it seems I need two "active" adapters to get this to work?

Here's my specific dilemma. I have two 24" dell ultrasharps and a Mitsubishi LDT46IV. Right now I have the Dell's hooked up, one via DVI and the other through a MDP to DVI. The TV is hooked up via HDMI to my BM Intensity Pro for a viewing monitor out of FCP.

Now, I would like to add the Mitsubishi as an additional monitor as well as let it act as a viewing monitor. I will do this via different inputs to the TV. however, I only have a VGA port to access on the TV as it is mounted into the wall and that is the only port that Support felt we may need

EDIT - It appears I also have another HDMI port I can access as well if that helps...

So, what adapters and cables do I need to get this specific setup to work? I have no preference how I hook them up but I just need them all to work at the same time. And... I can't do a lot of trial and error because my budget for the year is used up and it's hard to get blood out of the stone that is Support.

THANKS!!!

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Also, I have a MDP to VGA that I hooked the TV up with and that doesn't seem to allow all 3 to work.

 

[hackerwayne]

So I did some searching and it seems I need two "active" adapters to get this to work?

Here's my specific dilemma. I have two 24" dell ultrasharps and a Mitsubishi LDT46IV. Right now I have the Dell's hooked up, one via DVI and the other through a MDP to DVI. The TV is hooked up via HDMI to my BM Intensity Pro for a viewing monitor out of FCP.

Now, I would like to add the Mitsubishi as an additional monitor as well as let it act as a viewing monitor. I will do this via different inputs to the TV. however, I only have a VGA port to access on the TV as it is mounted into the wall and that is the only port that Support felt we may need

EDIT - It appears I also have another HDMI port I can access as well if that helps...

So, what adapters and cables do I need to get this specific setup to work? I have no preference how I hook them up but I just need them all to work at the same time. And... I can't do a lot of trial and error because my budget for the year is used up and it's hard to get blood out of the stone that is Support.

THANKS!!!

----------

Also, I have a MDP to VGA that I hooked the TV up with and that doesn't seem to allow all 3 to work.

You need an active MDP to HDMI adapter

 

[bax2003]

In general:
https://forums.macrumors.com/threads/1460739/

For three diplays you need active adapters and you will get max 1920x1200 from these adapters. Iy you need 2560x1440 or 2560x1600 you need for that Mini DP to DL DVI adapter.