Dear, Your service request : SR #{ticketno:[8200796071]} has been reviewed and updated. Response and Service Request History: I understand that your Motherboard does not post when you have 8 GPUs connected and are wondering if this limitation is caused by your Ryzen processor.  If I have missed any critical information about your inquiry, please let me know as my suggestion below may change.   Thank you for your email.   No, the limitation is not the processor. We have customers with Ryzen CPUs using up to 12 AMD GPUs in mining rigs. In your situation, it looks to be an incompatibility issue with the Motherboard and we recommend working with Asrock customer support directly to try and resolve the issue.   Please be advised that this service request will be permanently closed if you do not reply within 10 days. If more time is needed to respond to my e-mail above, please let me know and I will ensure that this service request remains open for you.  In order to update this service request, please respond, leaving the service request reference intact. Best regards, Matt B AMD Global Customer Care _____________________________________________________________________________________________ This email is a direct result of your contact with AMD Global Customer Care and not part of a campaign.  There is no need to unsubscribe to this email as you will only be contacted again if you directly request another service from AMD Global Customer Care. The contents of this message are provided for informational purposes only.  AMD makes no representation or warranties with respect to the accuracy of the contents of the information provided, and reserves the right to change such information at any time, with or without notice. _____________________________________________________________________________________________

I installed all 8 GPUs but left the 8th GPU's USB cable unplugged, booted the system, it POSTed OK, then I plugged the 8th GPU's USB cable during Windows boot and I could find the 8th GPU in the device manager but it had this error "This device cannot find enough free resources that it can use. (Code 12)

Edited by ASRickroll - 17 Mar 2018 at 1:30pm]]> Sat, 17 Mar 2018 13:27:55 +0000 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47982&title=asrock-x370-pro-cant-post-with-8-gpus#47982 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47676&title=asrock-x370-pro-cant-post-with-8-gpus#47676 Author: MisterJ
Subject: 7873
Posted: 14 Mar 2018 at 9:49am

Thanks much, pbfarme.  Your Device Manager does not look that different from mine which obviously stops at 4GB (Also RX 580).  I really don't need to see the GPU-Z, but do wonder if there is any information there of interest.  I am going to open my UEFI and compare to your screenshot - thanks.  I want to do some studying of what you posted and think after seeing my UEFI.  If I have any thoughts, I will post.  Enjoy, John.]]> Wed, 14 Mar 2018 09:49:18 +0000 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47676&title=asrock-x370-pro-cant-post-with-8-gpus#47676 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47670&title=asrock-x370-pro-cant-post-with-8-gpus#47670 Author: pbfarmer
Subject: 7873
Posted: 14 Mar 2018 at 9:10am

MisterJ wrote: pbfarmer, I assume you have tried various sets of 8 cards.  Are all these the same make/model?  If 8 will not boot, can you remove any one and boots OK?  Have you every looked in the device manager (when you can boot - maybe only 7 cards)?  Use the View-'Resources by type'.  If it is not too huge, post a screenshot or upload it so we can take a look.  I am really curious what it looks like with so many cards.  Please also post a screenshot of GPU-Z.  Please do not forget me on the request of where the "Above 4G Decoding" option is located.  Thanks and enjoy, John.

All 8 cards are Sapphire Nitro+ RX 580 8GB models (2 are the SE version, which is just a different shroud + LEDs.)  Any combination of 7 cards on any combination of 7 slots works perfectly.  Simply adding the 8th card, regardless of which one, or which slot, causes the UEFI to stop loading w/ a '0d' error.  After removing the 8th card, and clearing the CMOS (to clear the sticky error state,) the PC resumes normal operation.  Here's the resource (memmap) list - I've highlighted the biggest segments for each of the 7 cards.  As you can see, 1.) they're each using over 256MB a piece, and 2.) nothing is mapped above 4GB.  I'm assuming the issue is that the device mapping space spills over 2GB once the 8th card is installed.

Not sure what you want to see from GPU-Z - there's no way to really show details of 7 cards from that app.  

As for the Above 4G MMIO option, here's a screenshot:

Thanks!

 

Edited by pbfarmer - 14 Mar 2018 at 9:11am]]> Wed, 14 Mar 2018 09:10:13 +0000 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47670&title=asrock-x370-pro-cant-post-with-8-gpus#47670 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47662&title=asrock-x370-pro-cant-post-with-8-gpus#47662 Author: MisterJ
Subject: 7873
Posted: 14 Mar 2018 at 7:46am

pbfarmer, I assume you have tried various sets of 8 cards.  Are all these the same make/model?  If 8 will not boot, can you remove any one and boots OK?  Have you every looked in the device manager (when you can boot - maybe only 7 cards)?  Use the View-'Resources by type'.  If it is not too huge, post a screenshot or upload it so we can take a look.  I am really curious what it looks like with so many cards.  Please also post a screenshot of GPU-Z.  Please do not forget me on the request of where the "Above 4G Decoding" option is located.  Thanks and enjoy, John.
]]> Wed, 14 Mar 2018 07:46:19 +0000 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47662&title=asrock-x370-pro-cant-post-with-8-gpus#47662 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47652&title=asrock-x370-pro-cant-post-with-8-gpus#47652 Author: pbfarmer
Subject: 7873
Posted: 14 Mar 2018 at 6:10am

MisterJ wrote: I'm wondering if any of you have run GPU-Z ( https://www.techpowerup.com/gpuz/ ) to see if it tells you anything of interest.  Worth a try?  Enjoy, John.

Unfortunately, in general the machine doesn't even post w/ the 8th card installed.  In the rare case that it does, it's only because the card has somehow gone undetected by the UEFI, hence Windows doesn't know it exists.
 

]]> Wed, 14 Mar 2018 06:10:54 +0000 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47652&title=asrock-x370-pro-cant-post-with-8-gpus#47652 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47611&title=asrock-x370-pro-cant-post-with-8-gpus#47611 Author: MisterJ
Subject: 7873
Posted: 13 Mar 2018 at 11:09pm

I'm wondering if any of you have run GPU-Z ( https://www.techpowerup.com/gpuz/ ) to see if it tells you anything of interest.  Worth a try?  Enjoy, John.]]> Tue, 13 Mar 2018 23:09:17 +0000 https://forum.asrock.com/forum_posts.asp?TID=7873&PID=47611&title=asrock-x370-pro-cant-post-with-8-gpus#47611