AMD Radeon 7770 Three Monitors

[dfenton.irl]

I'm aware of similar threads here with the same query so I hate posting a duplicate one but the other threads advise using an active adapter which I've done but I still can't get it working.

My setup is currently, from card to monitor:

DP -> Active DP adapter -> HDMI
HDMI -> HDMI
DVI -> adapter -> VGA

The bottom two are working fine with 2 screens only. When I connect the top monitor, the bottom monitor looses connection, and I still only have 2 screens.

That bottom monitor has VGA connection only. I actually got three monitors working a few years ago but I can't recall how and I don't think I kept all the adapters/cables I had back then.

The active DP adapter I'm using is https://www.amazon.co.uk/gp/product/B00S0BWR2K/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

I don't mind buying more adapters but I want to make sure I'm buying the right ones.

Any advice would be greatly appreciated.

 

[need4speeds]

You need to enable Virtual super resolution. This allows different resolution monitors to work together.

Make sure Hydravision is installed too.

There are different ways to configure this, 1 is clone mode so all 3 are the same, or separate desktops 1 per monitor, and finally eyenfinity that makes the monitors into one wide virtual monitor.

 

[dfenton.irl]

You need to enable Virtual super resolution. This allows different resolution monitors to work together.

Make sure Hydravision is installed too.

There are different ways to configure this, 1 is clone mode so all 3 are the same, or separate desktops 1 per monitor, and finally eyenfinity that makes the monitors into one wide virtual monitor.

Thanks very much for your reply. I don't know if this matters but all three monitors supports 1920 x 1080. They aren't different resolutions.


Anyway, I am unable to make this change because under the Virtual Super Resolution setting, it says not supported

 

[need4speeds]

I am pretty sure it's some sort of software issue. I dunno what else so you will have to try some things and do some more searching.

Try to drag a browser window over to the other monitors with your mouse. Maybe they are working and it's just a blank screen showing. It works that way on my HD-4870 with 2 monitors.

Sometimes they claim it's 1080p when in fact it's slightly less. Like my 20" 1080p lcdtv is really 1862x1036. So the 3 monitors might not be exactly the same.

 

[dfenton.irl]

I am pretty sure it's some sort of software issue. I dunno what else so you will have to try some things and do some more searching.

Try to drag a browser window over to the other monitors with your mouse. Maybe they are working and it's just a blank screen showing. It works that way on my HD-4870 with 2 monitors.

Sometimes they claim it's 1080p when in fact it's slightly less. Like my 20" 1080p lcdtv is really 1862x1036. So the 3 monitors might not be exactly the same.

The third monitor definitely isn't working because it says it isn't receiving a signal.

All three monitors are definitely 1080p

 

[BFG-9000]

All I can suggest is to try a different active adapter.

The HD5000, 6000 and 7000 series could all drive only two monitors using the signal generators built into the GPU, and any extra monitors must use the signal generator on an active adapter, unless you happen to have a Sapphire FLEX card, which added extra signal generator chips right on the card.

Sapphire do sell their own active adapter, it's about US$25. I would expect theirs to work as they were OEM for most reference ATI/AMD cards.

 

[dfenton.irl]

All I can suggest is to try a different active adapter.

The HD5000, 6000 and 7000 series could all drive only two monitors using the signal generators built into the GPU, and any extra monitors must use the signal generator on an active adapter, unless you happen to have a Sapphire FLEX card, which added extra signal generator chips right on the card.

Sapphire do sell their own active adapter, it's about US$25. I would expect theirs to work as they were OEM for most reference ATI/AMD cards.

Thanks, so based on the setup I described above, you'd expect this to work?

 

[need4speeds]

I had this working on the HD-7850 crossfire setup i used to have. One was a gigabyte card and the other a asus. It ran at 1080p and used virtual super resolution for the 1862x1036 one and a 1440x900 monitor.

Try changing which monitor is the #1 monitor. I remember i had to do this and only a certain one had to be the main monitor or #1.

I also used a dp to hdmi active adapter.

 

[BFG-9000]

I would certainly hope so, given they probably made the card too. The reviews for all of these adapters though have a small percentage of people it didn't work for.

Ports do die as well, I am typing this on a computer where the video card has every port dead except the DVI!

 

[dfenton.irl]

Just want to give people an update. I tried a different configuration using an apple adapter I found instead of the active one I purchased:

DP -> Apple's Adapter -> VGA
HDMI -> HDMI
DVI -> adapter -> VGA

I was getting the same behavior. The middle HDMI screen would always work but once I connected the DVI screen, the DP would loose connection. So I could only get two screens to work at the same time.

I had an old 4:3 monitor which I connected to the DP via the VGA adapter and that worked - I got all three screens together although obviously that old monitor was at a lower resolution. Out of curiosity, I disconnected the old monitor and connected by other normal one again and it worked! All three monitors at 1920 x 1080.

I've no idea what happened after first connecting that old 4:3 monitor to suddenly get the normal three monitors to work correctly. I'm happy but a little puzzled.