AMD Motherboards - X570m Pro4 with 2 AMD RX 570 GPU's

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X570m Pro4 with 2 AMD RX 570 GPU's

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=16012
Printed Date: 18 Jul 2025 at 1:08pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: X570m Pro4 with 2 AMD RX 570 GPU's

Posted By: surfer4444
Subject: X570m Pro4 with 2 AMD RX 570 GPU's
Date Posted: 13 Sep 2020 at 9:24am

Aloha everyone,
My system specs are as follows:

M/B - Asrock X570M Pro4
CPU - AMD Ryzen 5 3600 (w/Noctua NH-U12S)
RAM - 2x Corsair Veng. 3200MHz 16Gb (32Gb total RAM)
GPU - 2x SAPPHIRE AMD RX570 8Gb (matched)
SSD - CRUCIAL P1 NVME M.2 1Tb (In primary M.2 slot under aluminum shroud)
HDD - 2TB Seagate 7.2k rpm
PSU - ANTEC HCG 750W
ENC - Thermaltake Core V21
O/S - Windows 10 Home

I am trying to run three displays on the two GPU's. I have 2 displays connected via DisplayPort to the primary GPU in PCIe slot 1 and 1 display connected to the other GPU in PCIe slot 2. The issue I am having is that only one graphics card seems to work at a time. If I plug in all three monitors as described above and restart my machine it defaults to the 2nd PCIe GPU and only one monitor works. If I unplug the monitor from the GPU in the 2nd PCIe slot and leave the other two plugged into the GPU in the first PCIe slot, they work as dual extended displays just fine. I have reset the CMOS, reinstalled fresh AMD GPU drivers twice, and still cannot get the third display to work. Please help and thank you in advance.