Intel Motherboards - ASRock H81 Pro BTC R2.0 6th gpu error

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ASRock H81 Pro BTC R2.0 6th gpu error

Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=6818
Printed Date: 03 Jan 2025 at 4:38pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: ASRock H81 Pro BTC R2.0 6th gpu error

Posted By: BobsBits
Subject: ASRock H81 Pro BTC R2.0 6th gpu error
Date Posted: 04 Dec 2017 at 8:23pm

I know this has been covered a little in thread:
http://forum.asrock.com/forum_posts.asp?TID=5807&title=asrock-h81-pro-btc-6th-gpu-problem
figured I should start a new one

I have a H81 Pro BTC R2.0 and was getting exactly the same error with 6 GPU cards. Using 5 cards works fine. With 6 cards, windows sibly wouldn't load.

I then logged into the bios. Under Chipset Configuration, I set 'share memory' from Auto to 256. I set 'IGPU Mult-Monitor' to enabled. Which allowed me to boot into Windows with all 6 GPU's plugged, but I still only have 5 usable GPU's.

I couldn't see an IOMMU setting in the Bios, unless it's the same as Share memory?

I am using Win 64bit 8.1 Pro, 8GB memory, 6 x RX 460 GPU's using drive 17.4.4. CPU is an Intel Core i3 4130T.

In resource monitor I can see that hardware reserved is 327MB.

I also tried setting Gen 1 and Gen 2 under PCIE2 Link Speed, with the same result.

I have tried every combination of GPU on every riser with all cables etc, so can confirm all hardware seems to be working properly.

TechPowerUp GPZ-Z only shows 5 cards listed. MSI Afterburner shows 6, but the 6th card has no name and it's settings can't be edited (greyed out)

I have completely removed the graphics drivers over and over, with the same result.

I am kind of running out of steam trying to get all 6 cards running. Angry

Any ideas?

Man thanks

Bob

Replies:

Posted By: thor4fun
Date Posted: 04 Dec 2017 at 9:56pm

" rel="nofollow - I have similar issues: 6xRadeon 580 on Windows 10 Pro or under linux - 6th GPU, to whatever port plugged in, with alternative PSU, rizers - not passing card bios check on ethOS. 5 GPU's work just fine.

I've read somwhere on the forum that if would be good to have 4g encoding option in BIOS, can Asrock provide that? Any bios update?

Posted By: BobsBits
Date Posted: 05 Dec 2017 at 11:28pm

I'm trying 1 or 2 more things when I get home. If it still doesn't work, I will return this for a refund and buy the Asus.

Posted By: BobsBits
Date Posted: 06 Dec 2017 at 4:20pm

SO after much much messing around, I now have 6 GPU's mining. A sys admin friend tried all manner of bios and driver tweaks, to no avail, then sent me the following link to an article about getting 6 gpu's mining (probably for your cards Thor4fun):

http://1stminingrig.com/run-6-rx-570-rx-580-gpus-windows-10/" rel="nofollow - http://1stminingrig.com/run-6-rx-570-rx-580-gpus-windows-10/

I was about to try the hybrid install in the article, but just tried AMD driver 16.11.5 on it's own, which worked ( http://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Crimson-Edition-16.11.5-Release-Notes.aspx" rel="nofollow - http://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Crimson-Edition-16.11.5-Release-Notes.aspx ).

Hope this helps anyone else with the same issue.