AMD Motherboards - b450m Pro4 no video output in crossfire

Print Page | Close Window

b450m Pro4 no video output in crossfire

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=11799
Printed Date: 28 Jul 2025 at 10:48am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: b450m Pro4 no video output in crossfire

Posted By: micheleonm
Subject: b450m Pro4 no video output in crossfire
Date Posted: 06 Jul 2019 at 10:07am

Hi!

MOBO b450m Pro4

I have two xfx RX580 but I was using only one of them, nevertheless, I tested both in crossfire a while ago and they worked perfectly, this with a BIOS prior ver. 2.00

A month ago I updated the BIOS to 3.30, everything perfect. Two days ago I decided to put the other graphics card but there is only a black screen (monitor connected through HDMI to primary card). Just for the sake of testing, I plugged the monitor to the secondary card and as expected there s no video.

I reset the BIOS with no results in the output. I tested both graphics cards one by one and they both work.

This is the most curious part, today I updated the bios to 3.40, tested again with no luck but again I re-tested connecting the HDMI to the secondary graphics card and there is video output.

My PSU is enough btw, as I said, I used both cards in crossfire in the past with the exact same configuration.

Anybody having these problems with newer bios firmware?