Mac Pro mid 2010 - 3 monitors

[scottr02]

Thanks for that, unfortunately I can't upgrade to Mojave because I'm using a 10-year old Wacom Cintiq drawing tablet and Wacom no longer supports drivers that old. So I'm stuck with High Sierra until I can replace the Wacom.

So currently my dilemma is this: While the new Radeon 580 card works perfectly with the two monitors, it's not working with the Cintiq. The Cintiq screen is showing green tinted, which I believe means it's not getting the signal correctly. The Radeon card has a dvi-d port, and my Cintiq uses a dvi-i. So I've tried two different adapters and getting the green screen on both. I tested the Cintiq on my laptop and confirmed the issue isn't with the Cintiq display itself, so I'm confident it's the adaptor. I believe I need a dvi-i (female) to dvi-d (male) adapter, but haven't had any luck with the two that I purchased. I would create a new post for this specific issue but I can't figure out how to start a new post here.
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Not to my knowledge. Depends on the cards of course.
I had two AMD 5770 in my 5,1 back in 2012 to be able to run 5 displays and never had issues.

Thanks, appreciated. How would I even connect two graphics cards, though? I only have two openings for the mini-6 pin connectors inside the computer, and both are used for my new 580 card. I could physically install the 5870 above it, but where would I attach the connector?

 

[flygbuss]

Maybe it’s worth trying a hdmi or DisplayPort to DVI adapter?
[doublepost=1563543905][/doublepost]

Thanks for that, unfortunately I can't upgrade to Mojave because I'm using a 10-year old Wacom Cintiq drawing tablet and Wacom no longer supports drivers that old. So I'm stuck with High Sierra until I can replace the Wacom.

So currently my dilemma is this: While the new Radeon 580 card works perfectly with the two monitors, it's not working with the Cintiq. The Cintiq screen is showing green tinted, which I believe means it's not getting the signal correctly. The Radeon card has a dvi-d port, and my Cintiq uses a dvi-i. So I've tried two different adapters and getting the green screen on both. I tested the Cintiq on my laptop and confirmed the issue isn't with the Cintiq display itself, so I'm confident it's the adaptor. I believe I need a dvi-i (female) to dvi-d (male) adapter, but haven't had any luck with the two that I purchased. I would create a new post for this specific issue but I can't figure out how to start a new post here.
[doublepost=1563543516][/doublepost]

Thanks, appreciated. How would I even connect two graphics cards, though? I only have two openings for the mini-6 pin connectors inside the computer, and both are used for my new 580 card. I could physically install the 5870 above it, but where would I attach the connector?

Well the 5770 just needs one cable each so I never had that problem.
But there are several threads about the power management of more modern cards. Just have a look here or google it. Due to my my lack of knowledge about it I can’t be much of help, sorry.
I would probably try to use one of the other ports first.
Or just get a small gpu that doesn’t need additional power. It won’t take that much space either.

 

[scottr02]

Maybe it’s worth trying a hdmi or DisplayPort to DVI adapter?
[doublepost=1563543905][/doublepost]

Thanks. I tried a dvi-i (female) to display port adapter but still got the green screen. I guess the only other option is to find a dvi-i (female) to hdmi. The 580 has an hdmi port, but I thought display port and hdmi were basically the same.

 

[flygbuss]

Maybe a GT120 would be sufficient to drive the tablet. It only takes one slot in height and doesn’t need additional power.

 

[Alaska_guy]

late to the game, didn't read everything. But an R9 280x supports 3 monitors. 2DVI, 1HDMI or DP. Most common config is DP and two DVI.

 

[orph]

you can also try a HDMI to DVI cable or RX 560 or GT 120 or GT 620 or GT 630 etc

 

[scottr02]

Hey all, just a followup on my graphics card and Wacom Cintiq connectivity issue. I found out the main connection cable on my old cintiq failed, so I've replaced it with a new tablet. I now have all 3 monitors connected to the new Radeon 580 and have also successfully installed Mojave OS. So, fingers crossed, everything is fixed! Thanks again for all the help here!

 

[orph]

is the display cable hardwired to the tablet?
it's a fairly common problem that some one has a bad, wrong cable or bad adapter plug (DVI to HDMI etc)

relay happy you had a good outcome, good luck with the new tablet

 

[scottr02]

Thanks! Yes, the new Cintiq is directly linked from the tablet to the graphics card via hdmi cable. I think the main dvi-i cable in the old tablet failed, because I tested it on my Macbook and had the same green screen on it when using the adapter. The only way the tablet worked was if I connected it via the vga cable, which in itself wasn't even a direct link because I had to use an adapter for it. I'm a graphic designer, so VGA isn't an option as I need correct colors and resolution.