B450 Gaming-ITX/ac Multi display issue

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   hello! I have a problem with ASRock Fatal1ty B450 Gaming-ITX/ac. If i connect two monitor to PC with this MB (DP-HDMI cable and HDMI - HDMI), them monitor on HDMI output picture blink off in random time.
I have seven PC with this problem, I tryed another cables, another monitors, but my issue dont solved.
if i connect one monitor all good. If I change MB to Asrock A520M-ITX/AC then all good.

config all pc:
CPU: Ryzen7 5700g 
MB: ASRock Fatal1ty B450 Gaming-ITX/ac
MEMORY: DDR4 32GB/64 GB (one  jor two module Kingstone,Patriot, Crucial)
SSD NWME 512gb (Kingstone,Patriot, Crucial)
BIOS 10.44
win 10/11 pro last updated
AMD driver last updated

Maybe you have any thoughts on this problem, I don?�t really want to change all the boards 

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medic2003 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 11 Mar 2026 Status: Offline Points: 15	Post Options Post Reply Quote medic2003 Report Post Thanks(0) Quote Reply Topic: B450 Gaming-ITX/ac Multi display issue Posted: 13 hours 55 minutes ago at 4:43pm
	hello! I have a problem with ASRock Fatal1ty B450 Gaming-ITX/ac. If i connect two monitor to PC with this MB (DP-HDMI cable and HDMI - HDMI), them monitor on HDMI output picture blink off in random time. I have seven PC with this problem, I tryed another cables, another monitors, but my issue dont solved. if i connect one monitor all good. If I change MB to Asrock A520M-ITX/AC then all good. config all pc: CPU: Ryzen7 5700g MB: ASRock Fatal1ty B450 Gaming-ITX/ac MEMORY: DDR4 32GB/64 GB (one jor two module Kingstone,Patriot, Crucial) SSD NWME 512gb (Kingstone,Patriot, Crucial) BIOS 10.44 win 10/11 pro last updated AMD driver last updated Maybe you have any thoughts on this problem, I don?�t really want to change all the boards

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Online Points: 36108	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 13 hours 6 minutes ago at 5:32pm
	If I am understanding your post correctly, you have multiple systems using this same motherboard, Fatal1ty B450 Gaming-ITX/ac, and all of them have the same issue with the HDMI output cutting out when used with another monitor connected to the DP output? If this is the case and you have already tried different cables, monitors and still have the issue then I would recommend you open a support ticket with ASRock: http://tw.asrock.com/events/tsd.asp It looks like you have already tried everything I would suggest. Sorry I can't be more helpful.