User Guide

Right
1. Smart-card slot*
Use smart cards for authentication, data storage, and application processing.
Within large organizations, you might also use smart cards for strong security
authentication of single sign-on (SSO). See “Use a smart card” on page 30.
2. Always On USB 3.1 connector
Gen 1
With the Always On USB feature enabled, the Always On USB 3.1 connector Gen
1 can charge a USB-compatible device when the computer is on, off, in sleep
mode, or in hibernation mode.
Notes:
• By default, Always On USB is enabled and Charge in Battery Mode is
disabled in UEFI BIOS.
• When the computer is off or in hibernation mode, and Charge in Battery Mode
is disabled in UEFI BIOS, ensure that you have connected the computer to ac
power.
To enable the Always On USB feature, do the following:
1. Enter the UEFI BIOS menu. See “Enter the UEFI BIOS menu” on page 43.
2. Click Config ➙ USB ➙ Always On USB to enable the Always On USB
feature.
3. Security-lock slot
Lock your computer to a desk, table, or other fixtures through a compatible
security cable lock. See “Lock the computer” on page 39.
* for selected models
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T490s and X390 User Guide