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Z790 PG-ITX/TB4 USB-C Boot

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Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
Printed Date: 26 Jul 2024 at 3:56am
Software Version: Web Wiz Forums 12.04 -

Topic: Z790 PG-ITX/TB4 USB-C Boot
Posted By: brianmichel
Subject: Z790 PG-ITX/TB4 USB-C Boot
Date Posted: 25 Aug 2023 at 10:39am
I've recently upgraded to a Z790 PG-ITX/TB4 and was excited to try to boot and use the thunderbolt ports on the back. Unfortunately, when attempting to boot a Windows 11 ISO on a USB-C thumbdrive nothing happens. It seems as if the drive isn't even recognized (nothing shows up in the BIOS).

I've enabled boot from Thunderbolt and Thunderbolt USB, but neither seemed to have done anything.

Am I doing something wrong? Does boot from USB only from from the USB-A ports on the back?

Posted By: bembe
Date Posted: 15 Sep 2023 at 11:29pm
I also have similar problems with Thunderbolt not detecting.
Did you enable boot in BIOS from that Thunderbolt drive?

Posted By: brianmichel
Date Posted: 17 Sep 2023 at 12:53am
I verified that I did have all the right boot settings set in the BIOS/UEFI but my main issue was the thumbdrive wasn't formatted correctly it seems.

I had originally attempted to make the boot drive from macOS (my primary machine), and while it looked correct, it didn't work until I rebuilt the thumbdrive on a different Windows machine using the Create Media tool from Microsoft.

I'd recommend checking that the drive has been formatted correctly since that was my issue!

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