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Four green 288-pin DDR5 RDIMM modules, bare chips, no heat spreaders

NEMIX RAM

NEMIX RAM 256GB (4×64GB) DDR5 4800 CL40 ECC RDIMM for ASUS K14PA-U12 EPYC 9004 memory upgrade

SKU CH-3MPC-4R0SE

A 256 GB DDR5 ECC registered server memory kit of four 64 GB modules running at 4800 MT/s CL40 for ASUS K14PA-U12 EPYC 9004 platforms

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 256 GB total capacity from four 64 GB modules
  • DDR5 4800 MT/s speed with PC5-38400 bandwidth
  • ECC registered RDIMM for data integrity
  • CL40 latency at 1.1 V operating voltage
  • Qualified for ASUS K14PA-U12 with EPYC 9004 processors

256GB DDR5 ECC RDIMM kit for ASUS EPYC 9004 servers

This NEMIX RAM kit provides 256GB of registered DDR5 memory across four 64GB modules. It is built for the ASUS K14PA-U12 motherboard running AMD EPYC 9004 processors. The ECC registered design targets data integrity in mission-critical server workloads.

DDR5 4800 CL40 registered DIMM constraints

The modules operate at DDR5 4800 with a CAS latency of 40 and 1.10V voltage. The 2Rx4 organisation and registered buffer add latency versus unbuffered memory. Maximum capacity and speed depend on the motherboard memory controller and populated slot count.

Four-module installation on a 128-core platform

Installing four 288-pin RDIMMs follows standard server DIMM seating procedure. The K14PA-U12 board for 128-core EPYC 9004 CPUs has specific population rules; incorrect slot order will prevent boot or reduce performance. Always consult the motherboard manual for the validated sequence.

How it compares

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

Price $6,767.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $26.44 per GB
Pricier than about 73% 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 numberMR38400-924K4
Total capacity256 GB (4 × 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 items256 GB (4 × 64 GB) DDR5 4800 MHz PC5-38400 2Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Should I choose the 4×64 GB kit or a different capacity for the ASUS K14PA-U12?

The 4×64 GB kit delivers 256 GB total, matching the 12-channel design of the EPYC 9004 platform for full bandwidth.

What does the 4800 MT/s rating mean once the modules are installed in the server?

The kit runs at DDR5 4800 (PC5-38400) with CL40 latency at 1.1 V, providing the rated throughput when populated across all 12 memory channels.

How does the 288-pin RDIMM interface limit performance on this motherboard?

The registered 288-pin DDR5 RDIMM interface supports ECC and 2Rx4 organisation, capping each module at the JEDEC-standard 4800 MT/s data rate.

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