Elitegroup Z87H3-A4 (V1.0) - Manual (Page 24)

Chapter 2
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Z87H3-A4 USER MANUAL
8. COM: Onboard serial port header
Connect a serial port extension bracket to this header to add a serial port to your
system.
7. TPM: Trusted Platform Module header
Trusted platform module (TPM) is a published specification detailing a
microcontroller that can store secured information, and implementations of that
specification.