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May 17th, 2025 11:19
Some of USB ports not recognized as bootable
Hello,
I have an old Dell Inspiron 580, Bios dated to 2010. It has original USB2 ports and additional USB3 ports on a card I installed. All USB ports work fine in Windows.
When I plug in a bootable USB drive into an original USB2 port, the boot menue shows me an option to boot from USB and it works fine. When I try to do the same using a new USB3 port, the boot menu shows no USB option.
I would greatly appreciate any constructive advise on resolving this issue.
Thanks
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Chino de Oro
9 Legend
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8.1K Posts
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May 17th, 2025 11:47
In generally, a USB 3 PCIe add-on card will be detected in BIOS and be recognized as USB controller. However, booting from USB connected to that USB 3 add-on card may not be possible unless BIOS or UEFI support direct boot from PCIe or an EFI driver like xHCI DXE is used.
On the other hand, your onboard USB 2 ports are natively boot supported by the chipset.
bradthetechnut
7 Technologist
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8.9K Posts
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May 18th, 2025 02:39
Also, with USB 3.0 add-on, BIOS doesn't have the driver for 3.0. Windows 10 & up does.