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Four green DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM RS700A-E12-RS4U 512GB (4×128GB) DDR5 4800 ECC RDIMM memory upgrade

SKU CH-23X3-HH9SZ MPN RS700A-E12-RS4U

Adds 512 GB of DDR5 ECC registered server memory in four 128 GB modules running at 4800 MT/s with CL40 latency

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512GB total capacity supports memory-intensive server workloads
  • Four 128GB DDR5 modules deliver high-density registered memory
  • ECC registered design detects and corrects data errors for stability
  • 4800MHz speed with CL40 latency optimises throughput for compatible ASUS servers
  • 1V operation reduces power draw per module

Target System

This 512GB DDR5 4800 ECC RDIMM kit is built for the ASUS RS700A-E12-RS4U dual-processor 1U server. Four 128GB modules provide high-capacity registered memory with on-die error correction for mission-critical workloads.

Compatibility Guidance

Suits administrators upgrading or populating the named ASUS 1U platform with validated DDR5 4800 registered DIMMs. Not for desktop boards, workstations needing unbuffered DIMMs, or any system that does not specifically support DDR5 288-pin RDIMM modules.

Deciding Specification

The kit delivers 512GB total capacity across four 128GB DDR5 4800 (PC5-38400) CL40 4Rx4 registered DIMMs at 1.1V. This exact capacity, speed, rank structure and voltage combination determines whether the memory matches the server's qualified vendor list.

How it compares

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

Price $15,476.99
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 $30.23 per GB
Pricier than about 86% 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 numberMR38400-744K4
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
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items512 GB (4 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does this 512GB DDR5 4800 kit require a motherboard with 288-pin DDR5 RDIMM slots and registered ECC support?

Yes, the kit uses 288-pin DDR5 RDIMM modules that need registered ECC memory slots on the motherboard to operate.

Can I install this kit alongside lower-capacity DDR5 RDIMM modules already in my server?

Mixing capacities is possible if all modules are DDR5 registered ECC RDIMMs, though matching speed, rank and voltage ensures stable operation.

How can I confirm the 4800 MT/s speed and CL40 latency are active after installing the four 128GB modules?

Check the BIOS memory information or use a system utility such as CPU-Z to verify the reported data rate and CAS latency.

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