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Two green DDR4 RDIMM sticks with black heat spreaders and gold contacts

NEMIX RAM

NEMIX RAM 256GB (2 x 128GB) DDR4 2933 PC4-23400 4Rx4 ECC RDIMM server RAM

SKU CH-ZPA0-YJFHK

Dual 128 GB registered ECC DDR4 modules at 2933 MHz with 4Rx4 organisation for high-density server workloads

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latency21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • 256 GB total capacity from two 128 GB modules for large server workloads
  • DDR4 2933 MT/s speed rated at PC4-23400 for high-throughput applications
  • ECC and registered design protects data integrity in mission-critical systems
  • 4Rx4 organisation maximises density per DIMM slot on compatible platforms
  • 2 V operation reduces power draw while maintaining 2933 MT/s performance

Server-grade DDR4 kit for high-capacity workloads

This 256 GB kit contains two 128 GB registered ECC modules rated at DDR4 2933 (PC4-23400). It is built for servers and workstations that require error-correcting memory and registered signalling. Standard desktop PCs cannot use these modules.

Registered design with 4Rx4 organisation

Each module uses a 4Rx4 layout and operates at 1.2 V through a 288-pin RDIMM interface. The registered buffer reduces electrical load on the memory controller, allowing higher densities per channel. CAS latency is 21 cycles at the rated speed.

DDR4 2933 bandwidth ceiling limits peak throughput

The PC4-23400 rating sets a maximum theoretical transfer rate that cannot be exceeded by this kit. Systems needing higher memory bandwidth must move to a faster DDR4 grade or a newer memory generation. Capacity per module is fixed at 128 GB, so expanding beyond 256 GB requires additional DIMM slots.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $1,430.99
Pricier than about 83% of the 6,523 comparable items (median $188.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
CAS latency 21
Lower than about 90% of the 439 comparable items (median 40).
Price per GB $5.59 per GB
Cheaper than about 68% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Model namePart#: MR23400-744K2-SM-SYS-5019P-M
Part numberPart#: MR23400-744K2-SM-SYS-5019P-M
Total capacity256 GB (2 × 128 GB)
Performance
Rated speedDDR4 2933 (PC4 23400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latency21
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Power
Rated voltage1.2 V

Questions about this item

Does DDR4 2933 PC4-23400 limit the bus speed to 2933 MT/s?

Yes, the DDR4 2933 rating means the modules run at up to 2933 MT/s, which corresponds to the PC4-23400 bandwidth specification.

Will these 288-pin ECC RDIMMs fit a standard server DIMM slot?

Yes, each 128 GB module uses the 288-pin DDR4 RDIMM form factor, so they install in any server board with matching DDR4 RDIMM slots.

How are the two 128 GB sticks installed, and what step is often missed?

Power down the server, open the chassis, align each module's notch with the slot key, press firmly until the retention clips click, then verify in BIOS that all 256 GB are recognised at 2933 MT/s.

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