https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 22 Apr 2026 03:23:53 +0000 Fri, 11 Dec 2020 01:56:54 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=17472 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=17472&PID=82111&title=x750-pro4-no-video-with-csm-disabled#82111 Author: r1348
Subject: 17472
Posted: 11 Dec 2020 at 1:56am

It looks like someone else is having the same issue with AMD ASRock mobos and Sapphire video cards:

https://www.reddit.com/r/ASRock/comments/jes2x0/disable_csm/
https://www.reddit.com/r/ASRock/comments/gc4936/b450_itx_fatal1ity_bios_not_showing_up_after/
]]> Fri, 11 Dec 2020 01:56:54 +0000 https://forum.asrock.com/forum_posts.asp?TID=17472&PID=82111&title=x750-pro4-no-video-with-csm-disabled#82111 https://forum.asrock.com/forum_posts.asp?TID=17472&PID=82110&title=x750-pro4-no-video-with-csm-disabled#82110 Author: r1348
Subject: 17472
Posted: 11 Dec 2020 at 1:49am

Hello,

I wanted to disable CSM from my BIOS settings to be able to enable "Above 4GB decoding" for video memory, which is basically SAM, but if I disable CSM I completely lose video output until the OS takes over. This also means that I can't see the BIOS configuration anymore and have to use the CMOS jumper to reset the mobo to factory settings.
My previous motherboard, an ASRock H77 Pro4/MVP, was working fine with CSM disabled with the same graphics card.

Here's my system specs:

AMD Ryzen 7 3700X
ASRock X570 Pro4
Sapphire Nitro+ RX580 SE
2x8GB Crucial DDR4-3600
2x512GB Samsung 850 Pro

Anyone known if there's any known bad UEFI interaction between my mobo and my graphics card?

Thanks!]]> Fri, 11 Dec 2020 01:49:49 +0000 https://forum.asrock.com/forum_posts.asp?TID=17472&PID=82110&title=x750-pro4-no-video-with-csm-disabled#82110