Lenovo ThinkServer n400, Installation And Service Manual

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• x8 = x8 organization
• x16 = x16 organization
– wwwww is the DIMM bandwidth, in MBps: 2133, 2400, 2666, 2933, 3200
– aa is the SDRAM speed grade
– m is the DIMM type
– E = Unbuffered DIMM (UDIMM), x64 p 8 bit ECC module data bus
– L = Load Reduced DIMM (LRDIMM), x64 p 8 bit ECC module data bus
– R = Registered DIMM (RDIMM), x64 p 8 bit ECC module data bus
– U = Unbuffered DIMM (UDIMM) with no ECC (x64-bit primary data bus)
– cc is the reference design file used for this design
– d is the revision number of the reference design used
– bb is the JEDEC SPD Revision Encoding and Additions level used on this DIMM
The following illustration shows the location of the DIMM connectors on the system board.
DIMM G1
DIMM G2
DIMM H1
DIMM H2
DIMM E1
DIMM E2
DIMM F1
DIMM F2
DIMM C1
DIMM C2
DIMM D1
DIMM D2
DIMM A1
DIMM A2
DIMM B1
DIMM B2
Microprocessor 2
Microprocessor 1
Figure 33. The location of the DIMM connectors on the system board
The following sections provide additional information specific to registered DIMMs that you must consider.
Chapter 5
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Removing and replacing server components
95