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Six green 288-pin DDR5 RDIMM modules in anti-static tray

NEMIX RAM

NEMIX RAM 768GB (6×128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade for RS520A-E12-RS12U

SKU CH-C0DS-PJ2RR MPN RS520A-E12-RS12U

768 GB DDR5 4800 ECC registered server memory kit in six 128 GB modules at CL40 and 1.1 V for the ASUS RS520A-E12-RS12U

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 768 GB total capacity from six 128 GB modules
  • DDR5 4800 speed delivers high data throughput
  • ECC registered design protects data integrity in servers
  • 10 V operation reduces power draw per module
  • 288-pin RDIMM form factor fits the RS520A-E12-RS12U

ASUS Server DDR5 4800 ECC RDIMM Kit

This 768 GB kit contains twelve 128 GB modules running at DDR5 4800 with CL40 latency and 1.10 V operation. It uses registered ECC RDIMM architecture built with major OEM chips for the ASUS RS520A-E12-RS12U 2U server.

Suited for memory-bound enterprise workloads

The six-channel population fills the supported slots on the target platform, delivering maximum registered ECC capacity for virtualization and database tasks. Systems that require unbuffered DIMMs, lower densities, or a different form factor cannot use this kit.

768 GB registered ECC capacity at DDR5 4800

The single specification that decides fit is the 768 GB (6 × 128 GB) DDR5 4800 CL40 4Rx4 registered ECC RDIMM configuration validated for the ASUS RS520A-E12-RS12U server.

How it compares

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

Price $22,933.99
Pricier than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (6 × 128 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $29.86 per GB
Pricier than about 85% 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 numberMR38400-744K6
Total capacity768 GB (6 × 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 items768 GB (6 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How does the CL40 latency affect sustained throughput on this DDR5 4800 kit?

CL40 is the CAS latency rating for these modules at 4800 MT/s; lower latency would improve response time but the kit is validated at this timing for the target server platform.

What thermal load should I expect from six 1.10 V registered DIMMs running continuously?

Each module operates at 1.10 V without a heat spreader; total power draw scales with all six slots populated, so ensure the chassis airflow meets the server vendor's cooling guidelines.

Which motherboard slot arrangement is required for this 6 × 128 GB 4Rx4 kit?

The kit is built for the ASUS RS520A-E12-RS12U single-socket 2U server and fills its six DDR5 RDIMM slots; consult the system manual for the exact population order.

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