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

NEMIX RAM

NEMIX RAM RS520A-E12-RS12U 512GB (8x64GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-HQCC-VF4ZT MPN RS520A-E12-RS12U

512 GB DDR5 4800 CL40 ECC RDIMM kit with eight 64 GB modules at 1.1 V for the ASUS RS520A-E12-RS12U server

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 512 GB total capacity with eight 64 GB modules
  • DDR5 4800 speed rated at PC5-38400 bandwidth
  • ECC registered design detects and corrects data errors
  • 10 V operation reduces server power draw
  • Validated for ASUS RS520A-E12-RS12U 2U single-socket server

System-specific DDR5 kit

This 512GB kit contains eight 64GB DDR5 4800 ECC registered DIMMs built for the ASUS RS520A-E12-RS12U single-socket 2U server. Each module runs at 1.1V with CL40 latency and a 2Rx4 organisation using major OEM DRAM from Samsung, Micron or Hynix.

Compatibility and limits

It suits administrators who need the full 512GB capacity supported by this specific server model and want validated ECC registered memory. Buyers with a different motherboard, a workstation that requires unbuffered DIMMs, or a system limited to lower densities should look elsewhere.

Capacity headroom

Eight slots are populated, so the server reaches its maximum supported memory without mixing module sizes. The kit handles large virtualisation clusters, in-memory databases and heavy compute workloads; further expansion would require a platform change.

How it compares

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

Price $14,621.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $28.56 per GB
Pricier than about 80% 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 numberMR38400-924K8
Total capacity512 GB (8 × 64 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 rank2Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASUS
In the box
Included items512 GB (8 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

What server do I need to install this 512GB DDR5 4800 kit into?

The modules are validated for the ASUS RS520A-E12-RS12U single-socket 2U server, matching the exact model name printed on the kit label.

How will these 4800 MT/s RDIMMs behave if my server currently runs slower DDR5 memory?

The server memory controller will downclock all installed DIMMs to the lowest common speed, so older slower DDR5 will limit these 4800 MT/s modules to that lower rate.

How can I confirm the full 512GB is recognised and ECC is active after installation?

Enter the BIOS or UEFI on the ASUS RS520A-E12-RS12U and verify the total memory shows 512 GB with ECC status reported as enabled for each of the eight 64 GB RDIMMs.

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