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Hardware options installation 27
CAUTION: Heatsink retaining screws should be tightened in diagonally opposite pairs (in an "X"
pattern).
13. Install the heatsink.
14. Install the SAS controller (on page 15).
15. Install the access panel (on page 13).
16. Install the server blade ("Installing a server blade" on page 20).
Memory options
IMPORTANT: This server blade does not support mixing LRDIMMs, RDIMMs, or UDIMMs.
Attempting to mix any combination of these DIMMs can cause the server to halt during BIOS
initialization.
The memory subsystem in this server blade can support LRDIMMs, RDIMMs, or UDIMMs:
• UDIMMs represent the most basic type of memory module and offer lower latency in one DIMM per
channel configurations and (relatively) low power consumption, but are limited in capacity.
• RDIMMs offer larger capacities than UDIMMs and include address parity protection.
• LRDIMMs support higher densities than single- and dual-rank RDIMMs, and higher speeds than
quad-rank RDIMMs. This support enables you to install more high capacity DIMMs, resulting in higher
system capacities and higher bandwidth.
All types are referred to as DIMMs when the information applies to all types. When specified as LRDIMM,
RDIMM, or UDIMM, the information applies to that type only. All memory installed in the server blade must
be the same type.
The server supports the following DIMM speeds:
• Single- and dual-rank PC3-10600 (DDR-1333) RDIMMs operating at up to 1333 MT/s
• Single- and dual-rank PC3-12800 (DDR-1600) RDIMMs operating at up to 1600 MT/s
• Single- and dual-rank PC3-10600 (DDR-1333) UDIMMs operating at up to 1333 MT/s