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ASRock X370 Pro - Can't POST with 8 GPUs
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pbfarmer View Drop Down
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote pbfarmer Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 2018 at 6:10am
Originally posted by MisterJ 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.
 
< x="0" y="0" width="99999" height="99999" id="hc_extension_off">< x="0" y="0" width="99999" height="99999" id="hc_extension_highcontrast">< x="0" y="0" width="99999" height="99999" id="hc_extension_highcontrast_back">< x="0" y="0" width="99999" height="99999" id="hc_extension_grayscale">< x="0" y="0" width="99999" height="99999" id="hc_extension_grayscale_back">< x="0" y="0" width="99999" height="99999" id="hc_extension_invert">< x="0" y="0" width="99999" height="99999" id="hc_extension_invert_back">< x="0" y="0" width="99999" height="99999" id="hc_extension_invert_grayscale">< x="0" y="0" width="99999" height="99999" id="hc_extension_yellow_on_black">< x="0" y="0" width="99999" height="99999" id="hc_extension_yellow_on_black_back">
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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.
Fat1 X399 Pro Gaming, TR 1950X, RAID0 3xSamsung SSD 960 EVO, G.SKILL FlareX F4-3200C14Q-32GFX, Win 10 x64 Pro, Enermx Platimax 850, Enermx Liqtech TR4 CPU Cooler, Radeon RX580, BIOS 2.00, 2xHDDs WD
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pbfarmer View Drop Down
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Originally posted by MisterJ 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!

 
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< x="0" y="0" width="99999" height="99999" id="hc_extension_off">< x="0" y="0" width="99999" height="99999" id="hc_extension_highcontrast">< x="0" y="0" width="99999" height="99999" id="hc_extension_highcontrast_back">< x="0" y="0" width="99999" height="99999" id="hc_extension_grayscale">< x="0" y="0" width="99999" height="99999" id="hc_extension_grayscale_back">< x="0" y="0" width="99999" height="99999" id="hc_extension_invert">< x="0" y="0" width="99999" height="99999" id="hc_extension_invert_back">< x="0" y="0" width="99999" height="99999" id="hc_extension_invert_grayscale">< x="0" y="0" width="99999" height="99999" id="hc_extension_yellow_on_black">< x="0" y="0" width="99999" height="99999" id="hc_extension_yellow_on_black_back">

Edited by pbfarmer - 14 Mar 2018 at 9:11am
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MisterJ View Drop Down
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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.
Fat1 X399 Pro Gaming, TR 1950X, RAID0 3xSamsung SSD 960 EVO, G.SKILL FlareX F4-3200C14Q-32GFX, Win 10 x64 Pro, Enermx Platimax 850, Enermx Liqtech TR4 CPU Cooler, Radeon RX580, BIOS 2.00, 2xHDDs WD
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Thanks guys great community Smile

AMD came back to me and reassured that it's not Ryzen limitation, here's their reply (my name omitted)
Quote
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.

_____________________________________________________________________________________________




By the way, I tried something crazy (TRY IT AT YOUR OWN RISK).
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
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kerberos_20 View Drop Down
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amd pbs features doesnt seems to be working on ryzen 1, not sure on ryzen 2, but for sure all those options on mine 1600x doesnt do anything at all

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Proper View Drop Down
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I am not sure if any info on this would be relevant but I will post it.

I had issues using large number of GPUs with Threadripper platfrom X399, after fairly long exploration of the issue I found that other devices on the board use up address allocation space in limited buffer and leave no space for more than 7 PCIe devices.

I was able to free up this space by disabling devices like sound controller, individual USB ports.  This allowed me to run total of 12 GPUs. I maybe able to do more but above 4g decoding is not supported on my board at the moment, I am waiting for that.

I wonder if doing same thing on Ryzen board may solve the issue.
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bios with 1.0.0.2 agesa has 64bit adressing (above 4g) option

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It worked!!!

I updated to the latest UEFI, which added another 'Above 4G' option.  But that one doesn't seem to work properly either, as it allowed me to boot w/ 8 GPUs attached, but still didn't assign resources to the 8th one, and no devices were actually assigned addresses above 4G.

Next, tho I had already previously disabled any audio, which didn't help, I've now also disabled some USB and ethernet controllers, and viola - 8th GPU assigned and available in Windows!

Thanks for the tip!
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