Asus M5A99FX PRO R2.0 - Manual (Page 51)

ASUS M5A99FX PRO R2.0 1-37
Chapter 1
11. TPM connector (20-1 pin TPM)
This connector supports a Trusted Platform Module (TPM) system, which securely
store keys, digital certificates, passwords and data. A TPM system also helps enhance
network security, protect digital identities, and ensures platform integrity.
TPM module is purchased separately.
12. Direct connector (2-pin DRCT)
This connector is for the chassis-mounted button that supports the DirectKey function.
Connect the button cable that supports DirectKey, from the chassis to this connector on
the motherboard.
Ensure that your chassis comes with the button cable that supports the DirectKey feature.
Refer to the technical documentation that came with the chassis for details.