Technical Product Specification

Functional Architecture Intel® Server Board S5520UR and S5520URT TPS

Intel order number E44031-012 Revision 1.9

3.2.4.3.2 Mirroring DIMM Population Rules Variance across Nodes

Memory mirroring in The Intel

Xeon

Processor 5500 Series and Intel

Xeon

Processor 5600

Series-based platforms is channel mirroring. Mirroring is not done across sockets, so each

socket may have a different memory configuration. Channel mirroring in socket 1 and socket 2

are mutually independent. As a result, if channel A and channel B have identical DIMM

population, and channel D and channel E have identical DIMM population, then mirroring is

possible even if the DIMM population is not identical for channel A and channel D.

For example, if the system is populated with six DIMMS {A1, B1, A2, B2, D1, E1}, channel

mirroring is possible. Both the populations shown in the following table are valid.

Table 8. Mirroring DIMM Population Rules Variance across Nodes

Mirroring

Possible?

Yes