Dell PowerEdge M710HD Technical Guide - Page 23

Dell • The M710HD memory system supports up to 18 DIMMs. DIMMs must be installed in each channel starting with the DIMM farthest from the processor. Population order will be identified by the silkscreen designator and the System Information Label (SIL) located on the chassis cover. o Memory Optimized or Sparing: {1, 2, 3}, {4, 5, 6}, {7, 8, 9} o Advanced ECC or Mirrored: {2, 3}, {5, 6}, {8, 9} 7.2 DIMMs Supported If DIMMs of different speeds are mixed, all channels operate at the fastest common frequency. • UDIMMs are not supported. • The first DIMM slot in each channel is color‐coded with white ejection tabs for ease of identification. The M710HD's DIMM sockets are placed 380 mils (11.43 mm) or 400 mils apart (spacing is increased in some areas to allow for more airflow); center‐to‐center in order to provide enough space for sufficient airflow to cool stacked DIMMs. DIMMs must be installed in each channel starting with the DIMM farthest from the processor (DIMM1). Population order is identified by silkscreen and a label. The order is dependent on the memory configuration used. For detailed information, see the System Memory section of the Dell PowerEdge Modular Systems Hardware Owner's Manual on Support.Dell.com/Manuals. 7.3 DIMM Slots Figure 3 illustrates the M710HD DIMM slots. For detailed information, see the System Memory section of the Dell PowerEdge Modular Systems Hardware Owner's Manual on Support.Dell.com/Manuals. Figure 3. Memory Slots and Risers 7.4 Speed The memory frequency is determined by a variety of inputs: • Speed of the DIMMs • Speed supported by the processor • Configuration of the DIMMs Table 7 shows the memory populations and the maximum frequency achievable for that configuration. For quad-rank DIMMs mixed with single- or dual-rank DIMMs, the quad-rank DIMM needs to be in the slot with the white ejection tabs (the first DIMM slot in each channel). There is no requirement for the order of SR and DR DIMMs. PowerEdge M710HD Technical Guide 23