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ravenbane
Adept I

I have a Radeon 7900 Series video card and it will not display more than 3 monitors at a time.

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I have a Radeon 7900 Series video card. It is supposed to run 6 monitors right out of the box. Mine will not run more than 3 monitors, and it even fried one of my monitors when I hooked up a 4th. I replaced it, and still only 3 will display at a time. In order to get the fourth working I have to shut off one of the other three. I have tried every variation of connections possible, and tried multiple cords. Because I can switch one off and turn the fourth on, I know they all work and are all recognized. The card simply will not display more than 3 at a time. Please advise.

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ravenbane
Adept I

Re: I have a Radeon 7900 Series video card and it will not display more than 3 monitors at a time.

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UPDATE: Apparently my friend was correct. I needed to use an "Active Mini-Display Port Adapter". I replaced one of the standard adapters I was using with an Active Adapter, and now I am able to use 4 monitors.

It's a Radeon 7990.

Radeon 7990.gif

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Hardwood
Paragon

Re: I have a Radeon 7900 Series video card and it will not display more than 3 monitors at a time.

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You don't specify which 7900 series videocard you have, so just guessing here's a blurb from ASUS.

How do I set up 6 montiors with AMD 7900 series VGA cards? AMD 7900 series VGA card has 2 DisplayPort (DP) 1.2 ports. You can use a DP1.2 compliant Multi Stream Transport (MST) hub and 3 other output ports to set up 6 monitors. Or, you can use 2 MST hubs to set up 6 monitors as shown below. (Note: The monitors should be DP1.2 compliant as well.)

ASUS TUF X570 wifi, AMD Ryzen 5 5600G, ASUS ROG STRIX RX580 8G Gaming, Antec Truepower new 700w. 16GB
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ravenbane
Adept I

Re: I have a Radeon 7900 Series video card and it will not display more than 3 monitors at a time.

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Thank you Hardwood.

  The card has one DVI port and 4 Mini-Display ports. I cannot find any further details on the PC in regards to which 7900 series card it is (I built this machine in 2013, and the box for the card is in the attic somewhere). I chose this model because it has 6Gb GDDR5 on the card and supports up to 6 monitors....if that helps. Attached are some SSs of the Radeon Settings window, in case that helps.

Update: With all of my searching, the best lead I have found was a suggestion that I need "Active Mini-Display Adapters" in order to run more than 2 monitors. I am currently running three without any "A M-D As", so I'm not sure if this is accurate. Regardless, I have ordered 3 of them, and I should have the first one today.

Graphics Stats.jpg

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Earnhardt
Exemplar

Re: I have a Radeon 7900 Series video card and it will not display more than 3 monitors at a time.

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Please also provide the essential INFORMATION REQUIRED WHEN POSTING A QUESTION.

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goodplay
MVP

Re: I have a Radeon 7900 Series video card and it will not display more than 3 monitors at a time.

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Install 'gpu-z', use the 'Lookup' function to find make/model.

Then post a query/search on the makers support site for info on what/how, you could also read the multi/eyefinity how to from the AMD Driver Help Portal

which also has links to eyefinity FAQs.

Don't forget to include all monitors make/models(& native res/refresh rate, 4k/5k).

Also, if you web search Radeon 7900, you'll find an amd site with specs (reference models ?).

Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, Aorus gen4 7000s 2tb, Nitro+RX6900XT, RM850, Win.10 Pro..
ravenbane
Adept I

Re: I have a Radeon 7900 Series video card and it will not display more than 3 monitors at a time.

Jump to solution

UPDATE: Apparently my friend was correct. I needed to use an "Active Mini-Display Port Adapter". I replaced one of the standard adapters I was using with an Active Adapter, and now I am able to use 4 monitors.

It's a Radeon 7990.

Radeon 7990.gif

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