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Four green DDR5 RDIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM RS520A-E12-RS12U 256GB (4x64GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-9NMG-X11KT MPN RS520A-E12-RS12U

256 GB DDR5 kit with four 64 GB ECC registered modules running at 4800 MT/s CL40 for the ASUS RS520A-E12-RS12U server

  • Capacity256GB (4 x 64GB)
  • SpeedDDR5 4800 (PC5 38400)
  • ECCYes
  • Buffered/RegisteredRegistered
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • Voltage1.10V
  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM for server data integrity
  • CL40 CAS latency at 1.1 V operating voltage
  • 288-pin 2Rx4 configuration built for ASUS RS520A-E12-RS12U

Targeted ASUS 2U Server Upgrade

This 256 GB kit contains four 64 GB DDR5 4800 ECC RDIMM modules built for the ASUS RS520A-E12-RS12U single-socket 2U server. Registered buffering and error correction protect data integrity in mission-critical workloads. The kit is engineered for IT professionals who manage enterprise infrastructure.

Replaces Slower or Smaller Factory Memory

Upgrading from lower-capacity or lower-speed DDR5 RDIMMs is worthwhile when virtualisation density, database caching or large-dataset analytics demand more bandwidth and capacity. The jump makes sense when the server currently runs at maximum DIMM count but still hits memory pressure under load.

Verify DIMM Slots and Qualified Vendor List

Confirm the RS520A-E12-RS12U has four free DDR5 RDIMM slots and that the motherboard QVL accepts 2Rx4 64 GB modules at CL40 1.10 V. Check the BIOS revision required for 256 GB total capacity before ordering.

Points forts

  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered RDIMM for server data integrity
  • CL40 CAS latency at 1.1 V operating voltage
  • 288-pin 2Rx4 configuration built for ASUS RS520A-E12-RS12U

Caractéristiques

BrandNEMIX RAM
SeriesASUS Server Motherboard Compatible Series Memory
ModelASUS DDR5 4800MHZ ECC RDIMM Registered Server Memory
Part NumberMR38400-924K4
Capacity256GB (4 x 64GB)
SpeedDDR5 4800 (PC5 38400)
ECCYes
Buffered/RegisteredRegistered
ChipsetMajor OEM Samsung, Micron, Hynix
Voltage1.10V
Compatible SystemASUS
CAS LatencyCL40
Heat SpreaderNo
Type288-Pin DDR5 RDIMM
Rank2Rx4
FeaturesDDR5 ECC Registered RDIMM Server Motherboard Compatible
Package Content256GB (4X64GB) DDR5 4800MHZ PC5-38400 2Rx4 1.1V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions sur cet article

Will the 288-pin DDR5 RDIMM modules fit the ASUS RS520A-E12-RS12U server motherboard?

Yes. The kit is built for that exact ASUS single-socket 2U server and uses the standard 288-pin DDR5 RDIMM form factor the board requires.

What is the correct order for populating the four 64GB modules during installation?

Follow the ASUS RS520A-E12-RS12U manual — typically fill the same-coloured slots per channel first, then the second channel, so the registered ECC modules initialise in the supported sequence.

When should the registered ECC RDIMMs be replaced or re-qualified in a production server?

Replace a module if ECC correctable-error counters rise sharply, if the server logs uncorrectable memory errors, or after a major firmware update that changes memory-training parameters.

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