https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 25 Apr 2026 09:32:09 +0000 Thu, 11 Jun 2020 05:22:43 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=14654 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=14654&PID=76324&title=cannot-disable-csm-on-b450m-pro4#76324 Author: CTB
Subject: 14654
Posted: 11 Jun 2020 at 5:22am

I changed the DUAL BIOS switch on the Sapphire Radeon RX 570 from Compute Mode to Gaming Mode. Now it works. It does not seem to be documented anywhere that Compute Mode equals Legacy Mode instead of UEFI. ]]> Thu, 11 Jun 2020 05:22:43 +0000 https://forum.asrock.com/forum_posts.asp?TID=14654&PID=76324&title=cannot-disable-csm-on-b450m-pro4#76324 https://forum.asrock.com/forum_posts.asp?TID=14654&PID=76319&title=cannot-disable-csm-on-b450m-pro4#76319 Author: CTB
Subject: 14654
Posted: 11 Jun 2020 at 2:00am

Hi,

I want to disable CSM on an ASRock B450M PRO4 with BIOS version 3.90 and Sapphire Radeon RX 570 8 GB PULSE. When I disable CSM in the boot menu, save changes and restart it will be enabled again after restarting. The restart after disabling takes longer than usual and the fans spin up several times. The screen stays off for a short while. The AS Rock image at boot is displayed at high resolution when having the display attached to a display port, but not when attached to a HDMI port. When entering the BIOS however it is displayed in 1024x768px even though FULL HD is enabled in the setup. That's why I'm suspecting not being able to disable CSM has something to do with the VBIOS and GOP support, but a Radeon RX 570 should support UEFI boot just fine.

Thanks!

Complete build
[URL=https://pcpartpicker.com/list/xcYd7T]https://pcpartpicker.com/list/xcYd7T[/URL]]]> Thu, 11 Jun 2020 02:00:43 +0000 https://forum.asrock.com/forum_posts.asp?TID=14654&PID=76319&title=cannot-disable-csm-on-b450m-pro4#76319