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Four green DDR5 RDIMM modules with black chips, no heat spreaders, 288-pin edge connectors

NEMIX RAM

NEMIX RAM 512GB (4x128GB) DDR5 4800 CL40 2Rx4 ECC RDIMM memory upgrade

SKU CH-CACE-YHAZR

512 GB kit of four 128 GB DDR5 4800 CL40 2Rx4 ECC registered RDIMMs validated for the Supermicro X14SDV-20C-SP3F motherboard

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 512GB 4X128GB

  • 512 GB total capacity from four 128 GB modules enables large-scale virtualization and in-memory databases
  • DDR5 4800 speed with CL40 latency delivers high bandwidth for compute-intensive server workloads
  • Registered ECC architecture with 2Rx4 rank corrects single-bit errors and stabilises fully populated channels
  • 10 V operation reduces power draw while maintaining enterprise-grade reliability
  • 288-pin RDIMM form factor validated for Supermicro X14SDV-20C-SP3F motherboard compatibility

Server-grade DDR5 RDIMM kit

This NEMIX RAM kit delivers 512 GB of DDR5-4800 registered ECC memory across four 128 GB modules. It is built for the Supermicro X14SDV-20C-SP3F motherboard and other platforms that require 288-pin RDIMMs with 2Rx4 organisation.

512 GB at CL40 1.1 V

The four modules run at the standard 4800 MT/s (PC5-38400) with CL40 latency and 1.10 V operation. Registered buffering and ECC let every slot stay fully populated at rated speed while correcting single-bit errors. Capacity scales to the board's maximum supported DIMM count; beyond that the memory controller will not recognise additional modules.

Verified fitment for Supermicro X14SDV-20C-SP3F

The kit matches the exact rank, voltage and timing the motherboard's memory controller expects, so it posts at full capacity without manual tuning. No heat spreaders are included, relying on server chassis airflow. Buyers needing UDIMM, SODIMM or non-ECC memory should look elsewhere.

How it compares

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

Price $15,772.99
Pricier than about 91% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $30.81 per GB
Pricier than about 88% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR38400-724K4
Total capacity512 GB (4 × 128 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
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items512 GB 4 × 128 GB DDR5 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Will this 512GB DDR5 4800 CL40 2Rx4 ECC RDIMM kit work alongside any existing DDR5 RDIMMs I keep in my Supermicro X14SDV-20C-SP3F?

The kit is spec-matched to the board's DDR5 4800 PC5-38400 1.1V 2Rx4 Registered ECC profile. Mixing ranks, speeds or voltages can prevent full-capacity recognition, so populate all slots with identical modules per the motherboard manual.

How can I confirm the 4x128GB kit is running at DDR5 4800 CL40 with ECC active after installation?

Enter the BIOS or UEFI and verify the memory speed reads 4800 MT/s, CAS latency shows CL40, total capacity reports 512GB, and ECC status is enabled.

What exactly ships in the box and is anything else required to install the 288-pin RDIMMs?

The package contains four 128GB DDR5 4800 CL40 1.1V 2Rx4 ECC Registered 288-pin RDIMMs. No additional parts are included; installation only needs a compatible Supermicro motherboard with available DDR5 RDIMM slots.

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