Memory bus operating frequency can be 1600 MT/s, 1333 MT/s, 1066 MT/s, or 800 MT/s depending on:
•
DIMM type (UDIMM, RDIMM, or LRDIMM)
•
DIMM configuration (number of ranks)
•
maximum frequency of the DIMMs
•
number of DIMMs populated per channel
•
DIMM operating voltage
•
system profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized)
•
maximum supported DIMM frequency of the processors
The system contains 24 memory sockets split into two sets of 12 sockets, one set per processor. Each 12-socket set is
organized into four channels. In each channel, the release levers of the first socket are marked white, the second socket
black, and the third socket green.
NOTE: DIMMs in sockets A1 to A12 are assigned to processor 1 and DIMMs in sockets B1 to B12 are assigned to
processor 2.
Figure 17. Memory Socket Locations
Memory channels are organized as follows:
Processor 1
channel 0: slots A1, A5, and A9
channel 1: slots A2, A6, and A10
channel 2: slots A3, A7, and A11
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