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1  Alternate cryptocurrencies / Mining (Altcoins) / Re: Road to RX 570/580 7 GPU MINING RIG on: September 10, 2017, 04:35:13 AM
Hey guys,

I read a lot about a problem with more than 4 cards and that you must combine drivers. But i expect you can start Windows, which doesnt recognise more than 4 cards.
I have a little different problem. With more than 4 cards my Win10 even wont start. I see only black screen. I can reach BIOS, thats all. With up to 4 cards everything is working perfectly.

I have motherboard Asus Prime h270-plus and Sapphire rx 580 8GB cards, PSU 1200w.
Do someone experinece same problem? I am desperate after 3 days of trying to solve this. Thanks for any help. If someone provides me a solution, my first payment will go on his adress.

If you are getting Black screen on the 5th card you need to enable 4G addressing options in the motherboard Bios.  Plug the 5th card enter the bios settings and find the option for enabling PCI bus to see more than 4 cards.     Read the thread above to find details of the option for that specific motherboard.   That is all you need then install the 5th card

Good Luck and Happy Mining
2  Alternate cryptocurrencies / Mining (Altcoins) / Re: MSI Z170A GAMING PRO CARBON 7GPU on: July 08, 2017, 11:44:09 PM
Hello, I'm new to the forum,
my configuration:
Intel Celeron G3930 7th gen(Kaby Lake)
MSI GAMING Z170A PRO CARBON
Kingston 8 GB DDR4
Intel 120GB SSD
7x Sapphire Rx 480 8GB OC (with modded bios)
EVGA Supernova 1200w

I installed the new BIOS and then installed the modded one, but every time I try to boot into windows it shows a backlit black screen and whenever I try booting a UEFI install usb it shows the windows loading circles and then backlit black screen. I've left it on for 24 hours with the same result.

Without the 4G decoding the system is fine, but whenever I try turning it on the system just does a backlit blackscreen, also I have PEG0 and PEG1 set to Gen1


What should I do? I'm really desperate right now, any help is appreciated.


I had much better luck using a Sky Lake Pentium G4400 CPU with this board and 7 GPU.  Couldn't get a Kaby Lake Celeron G3930 to work with 7 GPU.  Has anyone??  I read somewhere that Sky Lake was needed and it indeed fixed my issues.

@magnoman that is certainly a tip... where could you possibly read that?.   I am running 6xRX580 GPU and having problems with the 7th on the Celeron G3900 on Z170A Gaming Pro Carbon.    Using @creepas BIOS of course.
3  Alternate cryptocurrencies / Mining (Altcoins) / Re: AMD Rebrand - RX570 / RX580 - Official Thread on: July 08, 2017, 11:14:30 PM
Also, every time I've tried to use Afterburner with a 7-GPU rig, the whole thing crashed after it applied OC's to the 7th card. There must be some limitation there.

Seems we are on the same boat.   Why the 7th card has to be a problem?.   I ended up NOT using Afterburner at all.     Yes there must be an issue there with AB and the RX5xx drivers.   At this moment I set all OC and Undervolt on Claymore even though sometimes cards do not take it right away.   Known issue of Claymore.
4  Alternate cryptocurrencies / Mining (Altcoins) / Re: Road to RX 570/580 7 GPU MINING RIG on: July 08, 2017, 10:52:36 PM
Ok fellas, first of all huge thanks to all for the dedication and effort to get this working!

My Z170A Gaming Pro Carbon now perfectly recognises 7x RX 570 GPUs.

However..
Claymore doesn't.
It sees them alright, but errors out. "openCL error -4 (0) - Cannot create DAG on gpu.

It keeps restarting.

Any ideas appreciated!

run linux, it handles these things better.
Actually, I increased virtual memory to 16400 MB and this solved that.

Amazing. 7 GPUs mining on 1 MSI Z170A Gaming Pro Carbon mobo CONFIRMED!

This community is worth gold... I mean... Bitcoin. Worth more than gold.


Dragonmike can you give us an update on your rig?.   

Or anyone reading... with this MoBo MSI Z170A Gaming Pro Carbon I can get 6xMSI RX580 with no problem getting 29,5MH/s ETH on each.     BUT 7xGPU is now unstable clock/volt settings.      How about MoBo BIOS and GPU BIOS?    I have both modded.   Driver 17.4.4 patched with older AMD driver 16.9.2  folder.  Same as most people with this MoBO and the RX5xxs in order to get them detected.   

I donīt have precise power measuring but my PSU is EVGA 1300W which is sufficient for the rig.   I have Windows 10 Pro.

I believe if 6xGPUs are detected, installed, patched and mining there should be no reason to freeze with the 7th but that is where I am.   If anyone has some clue I really appreciate it.

Thanks a lot
JoeZener
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