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Author Topic: running HD7970 and HD5970 together  (Read 1564 times)
wowc8
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May 24, 2013, 09:41:45 PM
 #1

I've been running two HD7970s for about two weeks and just ordered two HD5970s to add to the mix.  Today I tried installing the HD5970s and the screen kept going blank for a couple seconds then returning, so I thought there might be some driver conflicts.  To help diagnose, I unpluged the two HD7970s and ran the two HD5970s, but there was no video.  

Has anyone run this configuration before?

I did find a forum that claims the 10.5a display drivers work best for HD5970s.  Will these drivers work for the HD7970s also?

Any help is appreciated

System specs:

MB: Asus P6T Deluxe V2
Mem: 12g
CPU: i7
PSU: 1000 Watt 80+ Gold (will be running 2 x 1000 watt PSUs when I have all four cards installed)
Cooling: Big box fan and plastic storage crate Wink

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wowc8
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May 24, 2013, 09:52:25 PM
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How do you physically have the cards installed? All on board or are you using risers?

I found when adding cards you will sometimes have drivers issues. Here's my solutions that seems to solve the issue 99% of the time:

Boot to desktop with all cards connected.
Run Catalyst Uninstall Utility (reboot)

I find Catalyst 12.1 to be solid (with those 4 cards you're using) but any will be fine really.

So download and install a CLEAN Catalyst (if you try to just update drivers without previously running the Uninstall Utility provided my AMD this will not work)

Reboot again, and you should be able to run all 4 cards w/o issues.

Literally did this with (6970,6970, 7870, 5770)

The cards are connected with two x1 to x16 risers and two powered x1 to x16 risers.  I'll try the Catalyst 12.1 after running the Catalyst uninstall utility and report back.

Thanks for the quick response!

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May 25, 2013, 10:48:26 PM
 #3

I'll hop on this too.

I have a 4850 and a 7850.

I wish to use my 4850 for games/desktop use.

And the 7850 for mining.

I've already tried it and I get a hyper transport sync flood error once I start mining on the 7850. Not sure what to do..?
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May 26, 2013, 06:18:39 PM
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Try using 12.4 drivers I've had luck with those on systems with mixed generations of cards
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May 28, 2013, 05:30:12 PM
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I'll hop on this too.

I have a 4850 and a 7850.

I wish to use my 4850 for games/desktop use.

And the 7850 for mining.

I've already tried it and I get a hyper transport sync flood error once I start mining on the 7850. Not sure what to do..?

Did you get any joy on this? I've picked up a 4770 as a 2nd card to go with my 7850 and would love to get them both working together.

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wowc8
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June 04, 2013, 09:00:53 PM
 #6

Ok, wanted to give a followup.

I finally have the cards working together.  Now only one 7970 and two 5970s because the xfx 7970 decided to stop working Sad.

I'm using only the newest drivers: http://support.amd.com/us/gpudownload/windows/Pages/radeonaiw_vista64.aspx

Catalyst 12.1 video drivers istalled fine for the 5970s, but the 7970 wasn't recognized.  Then I tried 12.8, which was a little better.  The 7970 was recognized, but wouldn't start.

The newest drivers worked for both 5970 and 7970.  The only issue that I have now is that the 7970 when running with the 5970s runs at a hash of 529KH/s, while running the 7970 by itself runs at 720KH/s.  I should mention that the setting are the same for the 7970 running with or without the 5970s.

I did have some trouble with cgminer not responding, so I downloaded Scrypt GUIMiner from https://bitcointalk.org/index.php?topic=150331.0 which runs them all just fine as long as I don't switch pools (my machine requires a restart for switching pools for some reason now).

Overall, not a great experience running them all on the same machine, but finally have them all working.  The 5970s are putting out at least 740KH/s each!

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Kinetic915
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June 04, 2013, 10:46:57 PM
 #7

Ok, wanted to give a followup.

I finally have the cards working together.  Now only one 7970 and two 5970s because the xfx 7970 decided to stop working Sad.

I'm using only the newest drivers: http://support.amd.com/us/gpudownload/windows/Pages/radeonaiw_vista64.aspx

Catalyst 12.1 video drivers istalled fine for the 5970s, but the 7970 wasn't recognized.  Then I tried 12.8, which was a little better.  The 7970 was recognized, but wouldn't start.

The newest drivers worked for both 5970 and 7970.  The only issue that I have now is that the 7970 when running with the 5970s runs at a hash of 529KH/s, while running the 7970 by itself runs at 720KH/s.  I should mention that the setting are the same for the 7970 running with or without the 5970s.

I did have some trouble with cgminer not responding, so I downloaded Scrypt GUIMiner from https://bitcointalk.org/index.php?topic=150331.0 which runs them all just fine as long as I don't switch pools (my machine requires a restart for switching pools for some reason now).

Overall, not a great experience running them all on the same machine, but finally have them all working.  The 5970s are putting out at least 740KH/s each!

I was curious what kind of power does your 5970 pull?

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June 04, 2013, 11:21:31 PM
 #8

Hio

The screen flipping on and off is normal when windows first sees the other gpus. If it continues to lose the signal, then its probably the psu.

Run the AMD uninstall utility, then try the 12.11 beta drivers. They have run every gpu mix I've thrown at them. Smiley

http://sites.amd.com/us/game/downloads/Pages/downloads.aspx

wowc8
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June 07, 2013, 06:25:51 PM
 #9

I was curious what kind of power does your 5970 pull?

Well... I don't know how to check that.  Is there some software that will allow me to monitor the power usage of each card individually?

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wowc8
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June 07, 2013, 06:26:49 PM
 #10

Hio

The screen flipping on and off is normal when windows first sees the other gpus. If it continues to lose the signal, then its probably the psu.

Run the AMD uninstall utility, then try the 12.11 beta drivers. They have run every gpu mix I've thrown at them. Smiley

http://sites.amd.com/us/game/downloads/Pages/downloads.aspx

I'll try this next. 

My plan 'B' will be to create a virtual pc instance for the 7970.

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