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Twelve green DDR5 RDIMM sticks in silver anti-static tray

NEMIX RAM

NEMIX RAM 768GB 12x64GB DDR5 6400 2Rx4 1.1V ECC RDIMM

SKU CH-GM1X-CZ3TQ

A 768GB DDR5 server memory kit of twelve 64GB registered ECC RDIMMs running at 6400MHz with CL52 latency and 1.1V operation

  • Total capacity768 GB (12 × 64 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latency52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 768 GB total capacity from twelve 64 GB modules
  • DDR5 6400 MT/s speed rated at PC5-51200
  • ECC registered design detects and corrects data errors
  • 2Rx4 dual-rank organisation increases memory density per slot
  • Low 1.1 V operating voltage reduces power draw

Server Memory Kit

This NEMIX RAM kit provides 768GB of DDR5 capacity across twelve 64GB registered DIMMs. It is built for servers that require ECC error correction and registered signalling at 6400MHz. The modules are not compatible with standard desktop or laptop platforms that use unbuffered memory.

Thermals and Power

Each module operates at a low 1.1V, helping to limit power draw and heat output in dense server configurations. Registered buffering reduces electrical load on the memory controller, contributing to stable operation under sustained workloads. No active cooling components are included on the DIMMs themselves.

Build and Connectors

The 288-pin RDIMM form factor fits standard DDR5 server slots and uses a 2Rx4 organisation with major OEM chips from Samsung, Micron or Hynix. CAS latency is rated at 52 cycles. Buyers needing unbuffered UDIMMs or lower-capacity kits for workstation boards cannot use this product.

How it compares

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

Price $25,911.99
Pricier than about 93% of the 6,523 comparable items (median $188.99).
Total capacity 768 GB (12 × 64 GB)
Higher than about 92% 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 $33.74 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#: MR51200-924K12-SM-AS-1015CS-TNR
Part numberPart#: MR51200-924K12-SM-AS-1015CS-TNR
Total capacity768 GB (12 × 64 GB)
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latency52
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Power
Rated voltage1.1 V

Questions about this item

How do I install the twelve 288-pin DDR5 RDIMM modules 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 ejector tabs click, then populate all twelve slots following the motherboard's channel population guide so the 2Rx4 ranks interleave correctly.

What maintenance or replacement will this 768GB DDR5 ECC RDIMM kit need over its service life?

The modules have no moving parts and require no scheduled maintenance; if a single 64GB stick fails the lifetime replacement warranty covers a swap, but the registered ECC design means errors are corrected on the fly so outright failure is rare.

What limit appears first when this 6400MHz DDR5 kit runs sustained workloads at 1.1V?

The CAS latency of 52 cycles sets the timing floor, so under continuous load the memory controller hits that latency boundary before voltage or thermal throttling becomes a factor.

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