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Graphics

mnusrath
Journeyman III
‎06-18-2020 10:44 PM

multiple monitors not working on HD7700

I used to have 4 monitors connected on my HD7700 video card. And some windows update happened and only 2 monitors are working. I tried removing one of the working one and the 3rd monitor started working and similarly when I remove 3rd monitor, the 4th monitor started working. So, at any given time only two were working. All the 4 monitors are good because I was able to use two monitors removing the other two and they work.

I have upgraded my OS to Windows 10 Pro and updating the drivers on HD 7700 by installing this driver.

win10-radeon-software-adrenalin-2020-edition-20.4.2-may25

But no luck.

Can someone help me what am I missing?

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2 Replies
xiatian
Adept II
‎06-19-2020 06:06 AM

Are the displays connected via DisplayPort natively or do you use DisplayPort to HDMI adaptors? AMD cards typically only have 2 available clock outputs, and HDMI requires a dedicated clock signal while DisplayPort does not, which means you cannot use more than 2 HDMI-attached displays unless you have an active DP-HDMI adaptor that adds the clock signal.

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Montalvn69
Journeyman III
‎11-11-2022 04:19 PM

I have 3 HDMI to HDMI and only two work at a time,
Any luck with this issue?

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