AB350 Pro4 Ultra Fast Boot and UEFI resolution
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=5762
Printed Date: 10 May 2024 at 10:19am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: AB350 Pro4 Ultra Fast Boot and UEFI resolution
Posted By: WakeUp77
Subject: AB350 Pro4 Ultra Fast Boot and UEFI resolution
Date Posted: 01 Aug 2017 at 9:17pm
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Hello! Initially I found UEFI screen resolution bug: when UEFI Full HD option set to auto, it brings me to 1024x768 screen resolution instead of 1080p (my display support it by defaults), and when I tried to enable Ultra Fast boot option, resolution of UEFI changed automatically to 1080p as it should be initially, but all my boot disks disapear (system on m.2 PCIe ssd) and computer boots only to UEFI. Turning off UF Boot bring my boot disk back, also with smaller screen resolution at UEFI. I have captured video, it should clarify the problem. https://cloud.mail.ru/public/DZrw/TsaxM1vJV" rel="nofollow - https://cloud.mail.ru/public/DZrw/TsaxM1vJV Is UltraFast Boot compatible with m.2 disks or it should be used only with 1-2 SATA ports?
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Replies:
Posted By: parsec
Date Posted: 01 Aug 2017 at 10:32pm
The Ultra Fast boot setting of the Fast Boot option is compatible with both SATA and NVMe PCIe/M.2 SSDs. But you must install your OS in UEFI booting mode in order to use the Ultra Fast setting. With Windows the OS drive will be GPT partitioned, and have an EFI System partition so it uses the EFI boot loader. The Ultra Fast setting requires UEFI booting. So when you try to use the Ultra Fast setting, you can only UEFI boot. That is explained in the help text of the Fast Boot option in the UEFI/BIOS. If your OS installation is MBR "Legacy" booting, and you use an M.2 PCIe SSD, my guess is you are using a Samsung 950 Pro or SM951, either the AHCI or NVMe models, which support MBR booting. Not all NVMe SSDs support UEFI booting. That explains why the boot disks are not listed in the boot order, they must have Legacy MBR booting OS installations. The Full HD UEFI feature works with the majority of PC monitors, but recently we have seen reports of a few monitors that for some reason stay at the lower resolution in the UEFI/BIOS. What model of monitor are you using, and what model video card do you use? ------------- http://valid.x86.fr/48rujh" rel="nofollow"> 
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WakeUp77 wrote:Posted By: WakeUp77
Date Posted: 01 Aug 2017 at 10:55pm
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Monitor is Samsung C27F390FHI, Video card is Palit GTX1070 SuperJetstream (NE51070S15P2). Intresting thing, that in UFB mode its detecting my 1080p resolution correctly :) Regarding the UFB, I most likely installed Win10 on a standard formatted partition during the installation (and my system disk is Samsung 960 EVO m.2 ssd), didn't specifically choose the GPT, there is a chance that it was MBR by the defaults. I just ended tuning all my windows programs and tweaks, so I will experiment with this only when I may need to reinstall it again. Thank you!
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