We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Twelve green DDR5 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 384GB (12x32GB) DDR5 4800 CL40 ECC RDIMM memory upgrade for RS520A-E12-RS12U

SKU CH-3RK5-QNZSD MPN RS520A-E12-RS12U

A 384 GB registered DDR5 kit with twelve 32 GB ECC modules at 4800 MT/s CL40 for the ASUS RS520A-E12-RS12U server

  • Total capacity384 GB (12 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 384 GB total capacity across 12 modules of 32 GB each
  • DDR5 4800 speed with PC5-38400 bandwidth for server workloads
  • ECC registered RDIMM design protects data integrity under load
  • CL40 CAS latency at 1.1 V voltage for efficient operation
  • 288-pin 1Rx4 configuration validated for ASUS RS520A-E12-RS12U

Capacity and compatibility

This 384GB kit contains twelve 32GB DDR5 modules built for the ASUS RS520A-E12-RS12U single-socket 2U server. Each module is a 288-pin ECC registered DIMM running at 4800 MT/s with CL40 latency at 1.10V. The 1Rx4 organisation and on-die ECC provide the data integrity required for mission-critical workloads.

Sustained load behaviour

Modules are stress tested under load to verify stability during extended server operations. The registered buffer reduces electrical loading on the memory controller, helping maintain consistent throughput when all twelve slots are populated. Operation at the standard 1.10V keeps power draw predictable inside the 2U chassis thermal envelope.

Upgrade scope and fit

This kit replaces lower-capacity DDR5 RDIMM sets or fills empty slots to reach the platform maximum. The jump is worthwhile when virtualisation density, in-memory databases or large dataset processing demand the full 384GB. It is not suited for workstations or consumer boards that accept only unbuffered memory.

How it compares

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

Price $9,857.99
Pricier than about 87% of the 21,161 comparable items (median $397.99).
Total capacity 384 GB (12 × 32 GB)
Higher than about 85% of the 20,941 comparable items (median 32 GB).
Price per GB $25.67 per GB
Pricier than about 70% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineASUS Server Motherboard Compatible Series Memory
Model nameASUS DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-314K12
Total capacity384 GB (12 × 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 items384 GB (12 × 32 GB) DDR5 4800 MHz PC5-38400 1Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the 1.10 V DDR5 RDIMM kit run hotter or louder than standard server memory under continuous load?

The modules operate at the standard DDR5 server voltage of 1.10 V with no heat spreader; thermal and acoustic behaviour matches the ASUS RS520A-E12-RS12U platform design for 4800 MT/s registered ECC DIMMs.

What must already be present in the ASUS RS520A-E12-RS12U for this 12-module kit to function?

The server needs all 12 DDR5 RDIMM slots free and a BIOS that supports 1Rx4 registered ECC DIMMs at 4800 MT/s; the kit itself contains every module required for the full 384 GB capacity.

Can I mix these CL40 1Rx4 modules with different-rank DDR5 RDIMMs already installed in the same server?

All 12 slots should be populated with identical 1Rx4 CL40 4800 MT/s registered ECC DIMMs to maintain the validated memory configuration for the RS520A-E12-RS12U.

More in Model-Specific Memory Upgrades

Similar items