Asus WS Z390 PRO Manual page 36

11. TPM connector (14-1 pin TPM)
This connector supports a Trusted Platform Module (TPM) system, which securely
stores keys, digital certificates, passwords and data. A TPM system also helps
enhance network security, protect digital identities, and ensures platform integrity.
The TPM module is purchased separately.
12. Thunderbolt header (5-pin TB_HEADER)
This connector is for the add-on Thunderbolt I/O card that supports Intel's Thunderbolt
Technology, allowing you to connect up to six Thunderbolt-enabled devices and a
DisplayPort-enabled display in a daisy-chain configuration.
The add-on Thunderbolt I/O card and Thunderbolt cables are purchased separately.
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Chapter 1: Product Introduction