Cannot enable Ultrafast Boot (Z590 Steel Legend)
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=18610
Printed Date: 27 Jul 2025 at 11:25am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Cannot enable Ultrafast Boot (Z590 Steel Legend)
Posted By: Indigo
Subject: Cannot enable Ultrafast Boot (Z590 Steel Legend)
Date Posted: 12 Apr 2021 at 6:15am
I've just finished building a new system, but now I see that I cannot enable Ultrafast Boot in the BIOS.
Motherboard: Z590 Steel Legend 6E WiFi, using the latest v. 1.30 BIOS.
Processor: Intel i9 10900KF
Temporary graphics card: nVidia GTX 660 Ti
RAM: Corsair Vengeance LPX 32GB in 2 modules
SSD: M.2 NVMe 1TB by SK Hynix P31
When I was installing Windows 10 64-bit Pro, I switched "Launch Storage OpROM Policy" setting to "UEFI Only", and storage is in AHCI mode, as listed in this guide, Method 1:
http://forum.asrock.com/forum_posts.asp%3cTID=1236&title=how-to-install-windows-on-a-pcie-ssd" rel="nofollow - http://forum.asrock.com/forum_posts.asp?TID=1236&title=how-to-install-windows-on-a-pcie-ssd
The CSM option is not disabled in the BIOS, but I don't know if it has any bearing on being unable to activate and keep Ultrafast Boot activated. I did not know that I needed to (do I?) set CSM to Disabled to allow Ultrafast Boot. The guide says "CSM is Enabled by default" and "...simply set the CSM option to Disabled. That has the same affect as setting the Launch Storage OpROM Policy setting to UEFI Only" So effectively CSM should be treated as Disabled in my case.
What is preventing the Ultrafast Boot mode Enabled setting from sticking? Every time I save and exit the BIOS, the Ultrafast Boot setting reverts to Disabled.
P.S.: I did add an HDD for storage, which is a 6TB WD Black model WD6001FZWX. Not sure if it has any bearing on the Ultrafast Boot setting.
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Replies:
Posted By: ASRock_TSD
Date Posted: 13 Apr 2021 at 6:29pm
Hi Indigo,
Thank you for your post.
We tested Z590 Steel Legend 6E WiFi (CSM disabled) in our lab, and the ultra-fast boot function is working fine.
After enabling Ultra-Fast boot, please press "F10" to save and reboot to OS to complete the Ultra-Fast boot setup.
Ultra-Fast boot requires the graphic card which supports GOP, please double-check with your GPU manufacturer.
If possible, we recommend installing the graphic card which supports GOP to test.
All the best,
ASRock TSD
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Posted By: Indigo
Date Posted: 13 Apr 2021 at 11:47pm
Thank you very much for your reply. I suspect my issue is with my graphics card, that does not have a UEFI-compatible vBIOS.
Just to double-check: once I do get a video card that supports UEFI BIOS, can I get ultra-fast boot working with CSM option Enabled (I cannot disable it--it keeps reverting to Enabled) but with "Launch Storage OpROM Policy" set to "UEFI Only"? My Windows install was done with UEFI mode, and all storage is set to AHCI.
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Posted By: ASRock_TSD
Date Posted: 16 Apr 2021 at 6:14pm
Hi Indigo,
Thank you for your reply.
If your graphic card only supports LEGACY mode, then it requires CSM enabled or your graphic card will not work.
Once you switch to the graphic card which supports UEFI mode, you can disable the CSM to try at this time, so the ultra-fast boot should work.
All the best,
ASRock TSD
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