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Green rectangular DDR5 memory module with black chips and gold contacts, no heat spreader

NEMIX RAM

NEMIX RAM RS520A-E12-RS24U 128GB DDR5 4800 CL40 1.1V ECC RDIMM memory upgrade

SKU CH-FZ6Z-D2KW2 MPN RS520A-E12-RS24U

128GB DDR5 4800 ECC registered RDIMM for ASUS RS520A-E12-RS24U servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 128 GB single module doubles server capacity
  • DDR5 4800 speed delivers 38400 MT/s bandwidth
  • ECC registered design protects data integrity
  • 1 V operation reduces power draw
  • Validated for ASUS RS520A-E12-RS24U 2U server

Single 128 GB DDR5 module

This NEMIX RAM module provides 128 GB of DDR5 memory in a single registered DIMM. It operates at 4800 MT/s with CL40 latency and 1.10 V. The 4Rx4 organisation and on-die ECC suit the ASUS RS520A-E12-RS24U 2U server platform.

Capacity-constrained 2U servers

The single-stick design fits systems that have limited DIMM slots but need maximum capacity per slot. Buyers who need to populate multiple channels with smaller modules should look at lower-density kits instead.

128 GB registered DDR5 capacity

The 128 GB per module density is the specification that determines whether this part matches the server’s memory plan. Verify the platform’s maximum per-slot limit and qualified vendor list before ordering.

How it compares

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

Price $4,162.99
Pricier than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $32.52 per GB
Pricier than about 90% 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 numberMR38400-744K1
Total capacity128 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 items128 GB (1 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

Does the 1.10V DDR5 4800 module throttle under sustained server workloads?

The registered ECC design and standard JEDEC voltage keep the 128 GB stick within spec during continuous operation.

How much heat and noise does this 4Rx4 RDIMM add to a 2U chassis running 24/7?

No heat spreader is fitted; the module relies on the server's forced-air cooling and produces no audible noise itself.

Which ASUS RS520A-E12-RS24U firmware revision is required before installing this 288-pin RDIMM?

The module is validated for the ASUS RS520A-E12-RS24U platform; consult the motherboard manual for the minimum BIOS version.

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