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Eight green DDR5 RDIMM sticks in anti-static tray

NEMIX RAM

NEMIX RAM RS720-E11-RS12U 256GB (8x32GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-YH8E-SH783 MPN RS720-E11-RS12U

256GB DDR5 4800 ECC registered server kit in eight 32GB modules for ASUS RS720-E11-RS12U

  • Total capacity256 GB (8 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256GB total capacity across eight 32GB modules
  • DDR5 4800 speed for high-throughput server workloads
  • ECC registered design protects data integrity
  • 1V operation reduces power draw
  • Validated for ASUS RS720-E11-RS12U 2U dual-socket servers

Server Memory Upgrade

This 256GB kit supplies eight 32GB DDR5 4800 CL40 ECC registered DIMMs built for the ASUS RS720-E11-RS12U dual-socket server. Each module runs at 1.10V with a 1Rx4 organisation using major OEM chips. The registered design adds a buffer that stabilises heavy multi-threaded workloads in virtualisation, database and compute clusters.

Thermals and Power

Operating at the standard 1.10V DDR5 voltage, the modules draw minimal power per stick while delivering PC5-38400 bandwidth across all eight slots. No heat spreaders are fitted, so airflow through the 2U chassis handles cooling without added acoustic load. The registered architecture keeps signal integrity high under sustained load, reducing correctable errors that would otherwise trigger retries.

Compatibility Assurance

The kit is validated for the specific ASUS RS720-E11-RS12U platform, removing guesswork from population rules and BIOS revision requirements. NEMIX RAM stress-tests every module under load before shipment, targeting the stability demanded by mission-critical deployments. Lifetime replacement coverage and US-based technical support back the installation, though buyers needing non-ASUS platforms or consumer motherboards should look elsewhere.

How it compares

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

Price $6,534.99
Pricier than about 82% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (8 × 32 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $25.53 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 numberMR38400-314K8
Total capacity256 GB (8 × 32 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 rank1Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items256 GB (8 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

How do I install the 8x32GB DDR5 4800 RDIMMs in the RS720-E11-RS12U server?

Power down the ASUS RS720-E11-RS12U, open the chassis, locate the 288-pin DDR5 slots, align each 1Rx4 module notch, press firmly until the ejector clips lock, populate all eight slots for 256GB total, then close the case and power on.

What maintenance or replacement will the DDR5 4800 ECC RDIMM kit need later?

The modules have no heat spreaders and run at 1.10V; keep server airflow clean, monitor ECC corrected-error counters in the OS, and replace any stick that logs uncorrectable errors — otherwise no scheduled maintenance is required.

What limit appears first under sustained load with this 256GB DDR5 4800 CL40 kit?

At 4800 MT/s and CL40 latency, the memory controller bandwidth ceiling is reached before thermal throttling on these bare 1Rx4 RDIMMs, so sustained throughput tops out at the rated PC5-38400 data rate.

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