General Memory Module Installation Guidelines - Dell PowerEdge M830 Owner's Manual

channel 3: memory sockets B4, B8, and B12
Processor 3 channel 0: memory sockets C1, C5, and C9
channel 1: memory sockets C2, C6, and C10
channel 2: memory sockets C3, C7, and C11
channel 3: memory sockets C4, C8, and C12
Processor 4 channel 0: memory sockets D1, D5, and D9
channel 1: memory sockets D2, D6, and D10
channel 2: memory sockets D3, D7, and D11
channel 3: memory sockets D4, D8, and D12
The following table shows the memory populations and operating frequencies for the supported
configurations.
Table 20. Supported configurations
DIMM type DIMMs
populated/
channel
RDIMM
LRDIMM

General memory module installation guidelines

Your system supports Flexible Memory Configuration, enabling the system to be configured and run in
any valid chipset architectural configuration. The following are the recommended guidelines for best
performance:
• LRDIMMs, and RDIMMs must not be mixed.
• x4 and x8 DRAM based DIMMs can be mixed. For more information, see the Mode-specific guidelines
section.
• A maximum of three single- or dual-rank RDIMMs can be populated in a channel.
• Up to three LRDIMMs can be populated regardless of rank count.
• Populate four DIMMs per processor (one DIMM per channel) at a time to maximize performance.
• If memory modules with different speeds are installed, they operate at the speed of the slowest
installed memory module(s) or slower depending on system DIMM configuration.
• Populate DIMMs based on the following processor-heat sink configurations.
• Populate DIMM sockets only if a processor is installed. For single-processor systems, sockets A1 to
A12 are available. For dual-processor systems, sockets A1 to A12 and sockets B1 to B12 are available.
• Populate all sockets with white release tabs first, black, and then green.
Voltage
1
2 1.2 V
3
1
2 1.2 V
3
Operating frequency
(in MT/s)
2400, 2133, and 1866
2400, 2133, and 1866
1866
2400, 2133, and 1866
2400, 2133, and 1866
2133
Maximum DIMM rank/
channel
single and dual rank
single and dual rank
single and dual rank
quad rank
quad rank
quad rank
67