5
Memory
The PowerEdge MX740c supports up to 24 DIMMs, with up to 3TB of memory and speeds up to 2666MT/s. The MX740c supports
registered (RDIMMs) and load reduced DIMMs (LRDIMMs) which use a buffer to reduce memory loading and provide greater
density, allowing for the maximum platform memory capacity. Unbuffered DIMMs (UDIMMs) are not supported.
Supported memory
The table below lists the memory technologies supported by the PowerEdge MX740c.
Feature
MX740c (DDR4)
DIMM Type
RDIMM, NVDIMM-N, LRDIMM
Transfer Speed
2666 MT/s, 2400 MT/s
Voltage
1.2V (DDR4)
The table below lists the supported DIMMs for the MX740c.
DIMM
type
DIMM speed (MT/s) DIMM capacity (GB) Ranks per DIMM
Data width
DIMM voltage
RDIMM
2666
8
1
x8
1.2V
RDIMM
2666
16
2
x8
1.2V
RDIMM
2666
32
2
x4
1.2V
LRDIMM
2666
64
4
x4
1.2V
LRDIMM
2666
128
8
x4
1.2V
NVDIMM 2666
16
1
x4
1.2V
Memory speed
The MX740c supports memory speeds of 2666 MT/s and 2400 MT/s depending on the processor installed. All memory operates at
the same voltage. By default, the speed will be the highest common supported speed between the CPUs and DIMMs. The operating
speed of the memory is also determined by the maximum speed supported by the processor, the speed settings, and the operating
voltage of the system that are in the BIOS.
The table below lists the memory configuration and performance details for MX740c, based on the quantity and type of DIMMs per
memory channel.
DIMM
type
DIMM ranking
Capacity
DIMM rated voltage,
speed
Intel Xeon Scalable Processor Family
1DPC
2DPC
RDIMM
1R / 2R
8GB, 16GB, 32GB
DDR4 (1.2V), 2666
D: 2666
D: 2666
LRDIMM
4R / 8R
64GB, 128GB
DDR4 (1.2V), 2666
D: 2666
D: 2666
16