Hardware options installation 39
16.
Install the heatsink.
17. Install the air baffle (on page 23).
18. Install the BBWC battery pack, if removed ("Installing the BBWC battery pack" on page 58).
19. Install the access panel (on page 22).
20. Slide the server into the rack.
21. Power up the server (on page 20).
Memory options
IMPORTANT: This server does not support mixing RDIMMs and UDIMMs. Attempting to mix
these two types causes the server to halt during BIOS initialization.
The memory subsystem in this server can support RDIMMs or UDIMMs. Both types are referred to as
DIMMs when the information applies to both types. When specified as RDIMM or UDIMM, the
information applies to that type only. All memory installed in the server must be the same type.
The server supports the following DIMM speeds:
• Single- and dual-rank PC3-10600 (DDR-1333) DIMMs operating at 1333 and 1066 MHz
• Quad-rank PC3-8500 (DDR-1067) DIMMs operating at 1066 MHz
Depending on the processor model, the number of DIMMs installed, and whether UDIMMs or RDIMMs
are installed, the memory clock speed may be reduced to 1066 or 800 MHz. For more information on
the effect of DIMM slot population, see "General DIMM slot population guidelines (on page 43)."
Memory subsystem architecture
The memory subsystem in this server is divided into channels. Each processor supports three channels,
and each channel supports three DIMM slots, as shown in the following table.
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