Asus RS500A-E6/PS4 - Manual (Page 60)

4-12 Chapter 4: Motherboard information
9. BMC header (BMC_FW1)
The BMC connector on the motherboard supports an ASUS ® Server
Management Board 4 Series (ASMB4).
10. TPM connector (20-1 pin TPM)
This connector supports a Trusted Platform Module (TPM) system, which can
securely store keys, digital certificates, passwords, and data. A TPM system
also helps enhance network security, protects digital identities, and ensures
platform integrity.