Then I’m putting my money on the PCIe setting in your bios. Try setting your PCIe lanes up as…
Gen2 (you may have to try Gen1)
8x4x4
Latency 96
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I don’t know if it makes a difference, but I am using ubuntu 16.04. I recommend you use the latest proprietary drivers version 16.50 from the AMD site.
You can upgrade to 16.04 like this:
sudo apt-get update
sudo apt-get upgrade
sudo do-release-upgrade
You can upgrade to 16.50 by:
sudo apt update
sudo apt upgrade
sudo apt remove amdgpu-pro
sudo apt upgrade
then reboot. If the machine does not come back up do a hard reboot with the power switch.
Then install amdgpu-pro 16.50 by:
tar xf amdgpu-pro-16.50-362463.tar.xz
cd amdgpu-pro-16.50-362463/
sudo ./amdgpu-pro-install
then reboot again
see if opencl is working with
sudo clinfo
If clinfo does not work install it
sudo apt install clinfo
everything should be working on the new drivers by then…
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I see … but on the AMD site there are drivers only for Ubuntu 15.04 for the HD 7900 Series.
For ubuntu 16.04 there are drivers for the series Radeon™ R9 290X, R9 290, R9 285, R7 260X, and R7 260 and for the series Radeon™ R9 Fury and R9 300 Series . Do you think these drivers would fit my HD7970s ? if so , which one ?
yes, that is what it says on the AMD page. On the Ubuntu page, it says something different. It says the HD7900 is supported by 16.04+
https://help.ubuntu.com/community/RadeonDriver
So I really don’t know if it works or not. But it only takes about 15 minutes to install Ubuntu and get it going. If you have an extra SSD you can do it on that card. You can follow the howto on my webpage to do the full setup. I wrote it because I always forget what to do.
The other bios setting to check is disable onboard video, of course.
Ok man , thanks again , i will try this also.
What i forgot to mention is that my risers are not powered , are just simple …idk how to call them . like this :
oh. In that case your PCI-E bus might not be able to deliver enough power. I have not tried that beyond 4 cards, so I don’t know.
How much power is it using? What PSU do you have? What settings?
Im really curious cause I just bought one.
@blockops You’re using Ubuntu 16.04 with latest 16.50 AMD drivers and getting 440 H/s on your R9 Fury Nitro’s??? That’s awesome man!
Claymore doesn’t recommend latest AMD drivers with R9 Fury’s, he recommends up to 16.3.2, but real world results speak louder than theory. Some people on there run R9 Fury’s with Ubuntu 14 and 15.x AMD drivers… but I don’t think they are getting as good results are you are.
This is encouraging. I’m sitting on 4 R9 Fury’s… haha I built the machine, but waiting on a single PSU solution, my EVGA G2 1600 watt comes in tomorrow.
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I am running Windows 10 with (6) R9 Fury’s. I have the EVGA 1600 G2 running the MOBO (MSI Z97) and 4 cards. The other two cards are connected to another PSU. Driver 16.3.2. Each card around 415 H/s. Has worked flawlessly. It’s a beautiful thing!
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Just moved a windows box with R9 Fury over to Ubuntu. Optiminer 1.5 lets you squeeze a little more out of it. The R9 Fury’s are doing 448 S/s at intensity level 7. If you want to do the same, you can follow my build how-to on this page. I just followed it myself on the latest build, so I know it works.
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Very nice tutorial! @blockops
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hmmm… then i guess i should buy 2 powered risers to reduce the load on the mobo ? also , from what i read recently i should apply some special settings on the VRAM and the BIOS of the GPUs i.n order to make them more efficient for mining (to use less power and compute more hashes).
Yes that’s what I’d recommend doing. Someone recommended getting the version 5 risers instead of the version 3 risers and provided a link and where to buy them. Those are the kind of risers I’m going to get next. I can’t find that link right now but it’s in either the optiminer or the Claymore topic.
And as far as updating the BIOS and reducing the voltage those are good things to do but you probably better off getting everything working first before you start doing that so you don’t have too many different things to troubleshoot at once.
Although if you can make it use less Power by reducing the voltage on it then maybe it’ll take less current also and you won’t need to get the powered risers.
Hello! I am currently running an nano 390 and a R9 nano. But i cannot get the 15.12 driver to work. The miner just crashes. but the 16.3.2. works fine. Any way i can get 15.12 working?
Just use 16.3.2 you will get the same hashrate as 15.12…
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Did someone help? Or have you figured out what was the problem?
In a few days we see another improvement in sol/s by Mr. Claymore. Keep out watching. He catches up on Optiminer 
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radeon standing standing by