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Four green DDR5 RDIMM sticks with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM RS720-E11-RS12U 256GB (4x64GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-3A2T-AP241 MPN RS720-E11-RS12U

256 GB DDR5 ECC registered server memory kit with four 64 GB modules at 4800 MT/s CL40, validated for the ASUS RS720-E11-RS12U 2U dual-socket platform

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity across four 64 GB modules
  • DDR5 4800 speed with PC5-38400 bandwidth rating
  • ECC registered design protects data integrity in servers
  • Low 1.1 V operation reduces power draw
  • Validated for ASUS RS720-E11-RS12U 2U dual-socket server

System-Specific DDR5 ECC RDIMM Kit

This NEMIX RAM kit provides 256GB of DDR5 4800 memory across four 64GB registered DIMMs. It is built for the ASUS RS720-E11-RS12U 2U dual-socket server and operates at 1.1V with CL40 latency. The modules use major OEM chips and include on-die ECC for data integrity.

Suits admins upgrading that exact ASUS 2U server

Buyers needing memory for a different platform, a workstation board, or a consumer desktop should look elsewhere. This kit is validated only for the named RS720-E11-RS12U system. Systems requiring unbuffered DIMMs, lower capacities, or different pin counts cannot use these modules.

256GB total capacity in four registered DIMMs

The 4 x 64GB configuration fills four slots with 2Rx4 organisation at the PC5-38400 standard. This specific density and rank structure determines whether the server's memory controller can address the full amount. Verify the motherboard's qualified vendor list before purchasing.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $6,533.99
Pricier than about 82% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $25.52 per GB
Pricier than about 70% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineASUS Server Motherboard Compatible Series Memory
Model nameASUS DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-924K4
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items256 GB (4 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the 256GB kit ship as four 64GB modules or do I need to buy extra sticks?

The kit contains four 64GB DDR5 RDIMM modules for a total of 256GB; nothing else is required for installation.

Why choose the 2Rx4 64GB configuration over other capacities for this server?

Each 64GB module uses a 2Rx4 organisation, letting the ASUS RS720-E11-RS12U reach 256GB across four slots while keeping registered ECC operation at 4800 MT/s.

What does the CL40 4800 MT/s rating mean for real workloads on this platform?

At 4800 MT/s with CL40 latency the registered ECC modules deliver the rated throughput and error correction the ASUS dual-socket server expects for mission-critical tasks.

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