HP ROM-Based Setup Utility - Manual (Page 112)

Address Mode 44-bit
NOTE: This option is available only on DL980 G7 servers.
Enabling this option allows memory to be addressed with 44 bits, allowing for configuration of a
large memory configuration, such as servers with more than 1 TB of memory. Verify that the OS
supports 44-bit addressing capability before enabling this option.
When this option is disabled, some installed memory in the system may not be configured; therefore,
it will not be recognized by the OS. This impact varies depending on the system memory
configuration.
Options include:
•
Disabled (default)—only 40-bits are used.
•
Enabled
112 RBSU menu-driven interface, version 3.xx or later (G6, G7, and Gen8 servers)