ASRock Forums : Unable to detect 2nd GPU on PCI Riser https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 15 Apr 2026 21:25:03 +0000 Tue, 22 May 2018 10:51:46 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=8735 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[Unable to detect 2nd GPU on PCI Riser : @kerberos_20 depends on the riser....]]> https://forum.asrock.com/forum_posts.asp?TID=8735&PID=51815&title=unable-to-detect-2nd-gpu-on-pci-riser#51815 Author: ssateneth
Subject: 8735
Posted: 22 May 2018 at 10:51am

@kerberos_20 depends on the riser. The more premium USB style risers typically already have PCI-E presence short on the PCB itself. Regular ribbon style risers will need a presence short depending on the slot used and motherboard. Some video cards may not work at all, even with presence short. I had a number of AMD cards that were hit-and-miss with detecting, thought it was dodgy risers, bad connection. Using the same board and risers and a bunch of nvidia cards later, each one detected flawlessly on the first shot.

There is usually not any option in motherboard BIOS/setting to change behavior OP. PCI-E Gen 1/2/3 makes no difference. The slot and device will negotiate the fastest generation and widest path that is physically supported. This is why some PCI-E 1x/4x slots have an open end on it so you can plug in pci-e card with more phyiscal pci-e lanes, and why you can plug in an old geforce 6800 ultra pci-e 1.0 card on a modern board or geforce gtx 1080 ti on an old x38 motherboard.


Edited by ssateneth - 22 May 2018 at 10:55am]]> Tue, 22 May 2018 10:51:46 +0000 https://forum.asrock.com/forum_posts.asp?TID=8735&PID=51815&title=unable-to-detect-2nd-gpu-on-pci-riser#51815 <![CDATA[Unable to detect 2nd GPU on PCI Riser : Do i need to set anything on mobo...]]> https://forum.asrock.com/forum_posts.asp?TID=8735&PID=51791&title=unable-to-detect-2nd-gpu-on-pci-riser#51791 Author: ericlaiys
Subject: 8735
Posted: 21 May 2018 at 6:13pm

Do i need to set anything on mobo to detect card on PCIE? How about set to Gen 1 rather than auto?]]> Mon, 21 May 2018 18:13:41 +0000 https://forum.asrock.com/forum_posts.asp?TID=8735&PID=51791&title=unable-to-detect-2nd-gpu-on-pci-riser#51791 <![CDATA[Unable to detect 2nd GPU on PCI Riser : hmm... i tried use on other motherboard,...]]> https://forum.asrock.com/forum_posts.asp?TID=8735&PID=51790&title=unable-to-detect-2nd-gpu-on-pci-riser#51790 Author: ericlaiys
Subject: 8735
Posted: 21 May 2018 at 6:12pm

hmm... i tried use on other motherboard, it is working fine & able to detect.
my pci riser is using this one:- https://www.lazada.com.my/products/jvgood-pcie-ver-006-pci-e-16x-to-1x-powered-riser-adapter-card-w-60cm-usb-30-extension-cable-molex-to-sata-power-cable-gpu-riser-adapter-ethereum-mining-eth-2-mintcell-cable-ties-i162521854-s193682030.html?spm=a2o4k.searchlist.list.1.64b37b11IGZPi3&search=1
That would be difficult as most seller dont tell if it include with A1-B17.
]]> Mon, 21 May 2018 18:12:36 +0000 https://forum.asrock.com/forum_posts.asp?TID=8735&PID=51790&title=unable-to-detect-2nd-gpu-on-pci-riser#51790 <![CDATA[Unable to detect 2nd GPU on PCI Riser : To get some mobos to detect gpus...]]> https://forum.asrock.com/forum_posts.asp?TID=8735&PID=51756&title=unable-to-detect-2nd-gpu-on-pci-riser#51756 Author: kerberos_20
Subject: 8735
Posted: 20 May 2018 at 4:28pm

To get some mobos to detect gpus using 1x risers u have to short some presence pins on the pci express slot. I believe it was A1 to B17.
some risers have that A1-B17 short built-in to them already. You can check with an ohmmeter.
]]> Sun, 20 May 2018 16:28:06 +0000 https://forum.asrock.com/forum_posts.asp?TID=8735&PID=51756&title=unable-to-detect-2nd-gpu-on-pci-riser#51756 <![CDATA[Unable to detect 2nd GPU on PCI Riser : Hi,Had AB350 Pro4 with 600w PSU...]]> https://forum.asrock.com/forum_posts.asp?TID=8735&PID=51753&title=unable-to-detect-2nd-gpu-on-pci-riser#51753 Author: ericlaiys
Subject: 8735
Posted: 20 May 2018 at 1:21pm

Hi,
Had AB350 Pro4 with 600w PSU & using Ryzen 3 2200G. MB using latest firmware 4.7. Got
1 unit of GTX 1060 6GB
1 unit of GTX 1050 Ti 4GB

Able to detect AMD integrated, GTX1050 (installed on PCI2 directly on motherboard) and GTX 1060 (installed on PCI1 using PCI Riser)
Problem is when i took out GTX1050 and use it on PCI Riser, i cannot detect this card in any PCI Slot.
Only work when plug into the motherboard.
Any idea why this is happening?
]]> Sun, 20 May 2018 13:21:04 +0000 https://forum.asrock.com/forum_posts.asp?TID=8735&PID=51753&title=unable-to-detect-2nd-gpu-on-pci-riser#51753