Supermicro SYS-1028R-WC1RT [63/128] Using ddr4 dimms with different operating frequencies is not allowed all channels in a system will run at the lowest common frequency

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Chapter 5: Advanced Serverboard Setup

5-13

Populating RDIMM/LRDIMM Memory Modules

Populating RDIMM/LRDIMM DDR4 Memory Modules

Type

Ranks

Per

DIMM

and

Data

Width

DIMM

Capacity

(GB)

Speed (MT/s); Voltage (V); Slots per Channel

(SPC) and DIMMs per Channel (DPC)

2 Slots per Channel

1 DPC 2 DPC

E5-2600

4 Gb 8 Gb 1.2 V 1.2 V 1.2 V 1.2 V

RDIMM SRx4 8 GB 16 GB 2133 2400 1866 2133

RDIMM SRx8 4 GB 8 GB 2133 2400 1866 2133

RDIMM DRx8 8 GB 16 GB 2133 2400 1866 2133

RDIMM DRx4 16 GB 32 GB 2133 2400 1866 2133

LRDIMM QRx4 32 GB 64 GB 2133 2400 2133 2400

LRDIMM 3DS 8Rx4 64 GB

128

2133 2400 2133 2400

Other Important Notes and Restrictions

• For the memory modules to work properly, please install DIMM modules of the

same type, same speed and same operating frequency. Mixing of RDIMMs,

UDIMMs or LRDIMMs is not allowed. Do not install both ECC and non-ECC

memory modules on the same serverboard.

• Using DDR4 DIMMs with different operating frequencies is not allowed. All

channels in a system will run at the lowest common frequency.