Two seperate Radeon GPUs

Galtsu · Apr 14, 2014

Hi!
I would like to run quad monitors with my R9 280X and Radeon HD 3850, but when i insert the 3850, my R9 doesn't work properly. I earlier had 3850 and GTX 570 and it worked fine.
I suppose this is a driver problem? I've tried installing all kinds of driver versions to see if they would work, but i haven't been lucky so far.
(2x primary monitors on R9 and 2x secondary displays on 3850)

Egitel · Apr 14, 2014

Can't run two separate cards in Crossfire. With a few rare, noted exceptions, cards in SLI/Crossfire have to be identical, and they especially have to be the same brand. Also, when running Crossfire or SLI, plug all the monitors into the main card, don't plug them into separate cards.

Edit: When I say the same brand, I'm referring to Nvidia/ATI, you can run an ASUS/MSI card together as long as they're both the same actual GPU, like a GTX 570 or whatever. Also, the cards have to have identical memory. Can't use a 1GB card with a 2GB card, etc.

Deemo13 · Apr 14, 2014

If you are trying to game on 3, that wont really work. I have a HD6950 working with an 8600GT running a second monitor.

What do you mean not working? Are some of the monitors not displaying?

Galtsu · Apr 14, 2014

I'm not trying to run crossfire or anything like that, i just want to use the 3850 to run my secondary monitors, so i can put all kinds of lovely information of my temperatures, clock speeds etc. on them.
I use my R9 to run the "primary" monitors for gaming and such.

Deemo13 · Apr 14, 2014

I do the same thing with my 8600GT to run my other monitor. Are some of the monitors not displaying or something? You might have to install legacy drivers for the 38xx since they stopped supporting those with the current driver set that your R9 uses.

Give that a shot.

Galtsu · Apr 14, 2014

When i install the 3850 to my mb, it messes up my R9 drivers, which i then have to reinstall(pain in the ass)

Deemo13 · Apr 15, 2014

Have you also installed the drivers for the 3850? 13.9 is the 3850's last driver and the R9's is 13.12. Its interesting that you have to install the drivers over again.

Galtsu · Apr 15, 2014

I just installed 13.9 drivers, removed the R9 and tested the 3850 to be 100% sure it works, and it did. After that was done, i installed the R9 back with 13.12 drivers and now it is like before, no video signal from the 3850. Catalyst and Windows shows both of the GPUs, what next?

Deemo13 · Apr 15, 2014

Are you able to run both of them with the 13.9 drivers? Unless you did that arleady.

Galtsu · Apr 15, 2014

I haven't gotten them both to work at the same time at any point

Egitel · Apr 15, 2014

The 3850 probably won't work with the current drivers, so that's why it's causing issues. If the R9 will work on the 3850's drivers, then you'll probably have to use them both on that one driver, even if not in Crossfire. Running two separate graphics drivers at the same time just doesn't work.

Deemo13 · Apr 15, 2014

Egitel :

It works but sometimes is tricky. I have my 8600GT on some Nvidia drivers and my Radeon HD6970 on 13.12 drivers from AMD.

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Two seperate Radeon GPUs

Galtsu

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Egitel

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Deemo13

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Galtsu

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Deemo13

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Galtsu

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Deemo13

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Galtsu

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Deemo13

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Galtsu

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Egitel

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Deemo13

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