Supported Memory - Dell PowerEdge M620 Technical Manual

Table 7 lists the DIMMs that are supported on the M620. For the latest information on supported
memory, visit Dell.com.
Only
Capacity
(GB)
2
2
2
4
4
4
4
4
8
8
16
16
32
32
The M620 server supports flexible memory configurations ranging from capacities of 2GB to 768GB
(using 32GB DIMMs), and up to 12 DIMMs per processor (up to 24 DIMMs in a dual-processor
configuration). Each processor has 4 memory channels, with each channel supporting up to 3
DIMMs.
The M620 is available in the following memory capacity options:
24-DIMM capacity: uses a 57mm heatsink and is recommended for use with processors of 95W

or less
 20-DIMM capacity: uses a 77mm heatsink for cooling efficiency and is recommended for use
with 115W and 130W processors
16-DIMM capacity: uses a 97mm heatsink to support the higher ambient temperatures of fresh

air configurations
The M620 supports a flexible memory configuration according to the following 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 is allowed per system: UDIMM, RDIMM, or LRDIMM. These
types cannot be mixed.
The following additional memory population guidelines apply to the M620:
Speed
Type
(MT/s)
1600 RDIMM
1333 RDIMM
1600 UDIMM
1333 RDIMM
1600 RDIMM
1333 RDIMM
1333 RDIMM
1600 UDIMM
1333 RDIMM
1600 RDIMM
1600 RDIMM
1333 RDIMM
1333 LRDIMM
1333 RDIMM
Ranks
Data
per SDDC support
width
DIMM
1 x8 Advanced ECC
1 x8 Advanced ECC
1 x8 Advanced ECC
2 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
4 x4 All modes
4 x4 All modes
Voltage
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35
1.35