Digital Equipment AlphaServer 2000, Руководство пользователя, Страница: 108 / 196

System Bus Options
Memory Configuration Rules
Observe the following rules when configuring memory on the
AlphaSever 2000 system:
• You cannot mix 4-megabyte SIMMs and 16-megabyte SIMMs
on an individual module.
• Fill your first memory module to capacity before adding
memory to the second module.
• You can fill the second memory module with 1, 2, or 4 banks
of SIMMs.
• Maximum memory is 640 megabytes using one fully
populated module with 4-megabyte SIMMs and one fully
populated module with 16-megabyte SIMMs.
Warning
Before installing a memory module, turn off all power to
the system (both AC and DC). Refer to ‘‘Powering Down
the System’’ in Chapter 1 for information about turning
off AC and DC power.
Expansion I/O
If either additional PCI slots or 64-bit I/O performance is
required, an expansion I/O module can be added to the system in
place of a memory module in slot 1. The expansion I/O module
provides two PCI slots, which can be accessed from the rear of
the system for external expansion.
Note
Expansion I/O is planned as a future enhancement.
Check with your Digital representative for information
on availability.
3–24 Options and Upgrades