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Four green DDR5 ECC RDIMM modules in silver anti-static tray

NEMIX RAM

NEMIX RAM 128GB (4 x 32GB) DDR5 6400 ECC RDIMM 2Rx8 1.1V

SKU CH-AC2S-D50BW

ECC registered DDR5 kit delivering 128 GB across four 32 GB modules at 6400 MT/s with CL52 and 1.1 V operation

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latency52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 128 GB total capacity from four 32 GB modules
  • DDR5 6400 speed with CL52 latency for fast server throughput
  • ECC registered design detects and corrects memory errors
  • 1 V operation reduces power draw per module
  • 288-pin RDIMM form factor fits registered server slots

128GB DDR5 ECC RDIMM kit

This NEMIX RAM kit provides 128GB of DDR5 server memory across four 32GB registered DIMMs. It operates at 6400MHz with a CAS latency of 52 and a low 1.1V voltage. The modules use 2Rx8 organisation and ECC for data integrity. They are built with major OEM chips from Samsung, Micron or Hynix.

Servers needing registered ECC DDR5

This memory suits rackmount and tower servers that require registered ECC DDR5 at 6400MHz. Workstations and desktop PCs that accept only unbuffered non-ECC DDR5 cannot use these modules. Buyers who need consumer SO-DIMM or UDIMM formats should look at other product lines.

Registered 288-pin DDR5 6400MHz form factor

The decisive specification is the registered 288-pin DDR5 6400MHz RDIMM form factor with ECC. A motherboard must explicitly support registered DDR5 ECC memory at this speed and pin count. Without that support the modules will not function in the system.

How it compares

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

Price $5,159.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 90% of the 6,064 comparable items (median 32 GB).
CAS latency 52
Higher than about 90% of the 439 comparable items (median 40).
Price per GB $40.31 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Model namePart#: MR51200-328K4-SM-AS-1015CS-TNR
Part numberPart#: MR51200-328K4-SM-AS-1015CS-TNR
Total capacity128 GB (4 × 32 GB)
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latency52
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Power
Rated voltage1.1 V

Questions about this item

How much power does the 1.1 V DDR5 6400 kit draw when the server runs all day?

Each module runs at 1.1 V; total power depends on your platform and workload, so consult your server vendor for exact figures.

What must my motherboard provide to use these 288-pin ECC RDIMMs?

A DDR5 RDIMM slot with registered ECC support and a memory controller that accepts 2Rx8 modules at 6400 MT/s.

Will these 2Rx8 modules work alongside older 1Rx8 DDR5 sticks I already own?

Mixing ranks is possible on many platforms but may force lower speeds or disable multi-rank features; check your server manual.

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