RX4770 M1 Upgrade and Maintenance Manual 273
14 System board and components
Safety notes
V CAUTION!
● Devices and components inside the server remain hot after
shutdown. After shutting down the server, wait for hot components to
cool down before installing or removing internal options.
● Circuit boards and soldered parts of internal options are exposed and
can be damaged by static electricity. Always discharge static build-up
(e.g. by touching a grounded object) before handling electrostatic-
sensitive devices (ESDs).
● Do not touch the circuitry on boards or soldered parts. Hold circuit
boards by their metallic areas or edges.
● For further information, please refer to chapter "Important
information" on page 31.
14.1 Basic information
● CMOS battery
CMOS memory (volatile BIOS memory) and the real-time clock are powered
by a lithium coin cell (CMOS battery). This cell lasts up to ten years,
depending on ambient temperature and use.
If the CMOS battery is depleted or falls below minimum voltage levels, it
need to be replaced immediately.
● UFM (USB Flash Module)
The server can be equipped with a USB Flash Module (UFM), located on the
BMC riser (see "BMC riser" on page 154)
● TPM (Trusted Platform Module)
The system board is optionally equipped with a Trusted Platform Module
(TPM). This module enables programs from third party manufacturers to
store key information, for example drive encryption using Windows Bitlocker
Drive Encryption.
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