Asus P8B-C/4L User Manual page 57

11. 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.
12. LAN34 LED connector
(5-1 pin LAN34_LED1, , P8B-C/4L, P8B-C/SAS/4L only )
This connector supports a backplane with 4 LAN LEDs. Connect the LAN
LED cable to the backplane for LAN activity indication.
ASUS P8B-C series 2-39