Supported Memory - Dell PowerEdge R520 Technical Manual

The R520 supports the DIMMs listed in Table 8. For the latest information on supported memory,
visit Dell.com.
Capacity
(GB)
2
2
2
4
4
4
4
8
8
16
16
Flexible memory configurations are supported on the R520, ranging from capacities of 2 GB to
192 GB. The system supports up to 6 DIMMs per processor (up to 12 DIMMs in a 2-processor
configuration). The R520 has 3 memory channels per processor, with each channel supporting up to
2 DIMMs.
The R520 supports a flexible memory configuration according to these basic rules:

Speed: If DIMMs of different speeds are mixed, all channels across all processors operate at the
slowest DIMM's common frequency.

DIMM type: Only one type of DIMM can be used in a system. UDIMMs and RDIMMs cannot be
mixed.
The following additional memory population guidelines apply to the R520:

Up to two quad-rank (QR), dual-rank (DR), or single-rank (SR) DIMMs may be populated per
channel.

DIMMs must be installed in each channel, starting with the DIMM farthest from the processor.

DIMMs should be installed with largest rank count to smallest. For example, if DR DIMMS are
mixed with SR DIMMs, DR DIMMS should be placed in the lowest DIMM slots, followed by the SR
DIMMs.
For more information on memory configuration, see the
Manual
on Support.Dell.com/Manuals.
The R520 supports memory speeds of 1600 MT/s, 1333 MT/s, 1066 MT/s, and 800 MT/s depending
on the DIMM types installed and the configuration. All memory on all processors and channels run
Speed Type Ranks per
(MT/s) DIMM
1333 RDIMM
1333 UDIMM
1600 RDIMM
1333 RDIMM
1333 RDIMM
1333 UDIMM
1600 RDIMM
1333 RDIMM
1600 RDIMM
1333 RDIMM
1600 RDIMM
Data SDDC support
width
1 x8 Advanced ECC
1 x8 Advanced ECC
1 x8 Advanced ECC
2 x8 Advanced ECC
1 x4 All modes
2 x8 Advanced ECC
2 x8 Advanced ECC
2 x4 All modes
2 x4 All modes
2 x4 All modes
2 x4 All modes
Dell PowerEdge R520 Systems Owner's
Voltage
1.35
1.35
1.5
1.35
1.35
1.35
1.5
1.35
1.5
1.35
1.5