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Four green DDR5 RDIMM modules without heat spreaders in a clear plastic tray

NEMIX RAM

NEMIX RAM DDR5 ECC RDIMM 512GB 4x128GB 4800 CL40 Supermicro H13DSG-O-CPU

SKU CH-QAH8-0SP2W

A 512 GB DDR5 ECC registered kit of four 128 GB modules running at 4800 MHz CL40 for the Supermicro H13DSG-O-CPU motherboard

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 512GB 4X128GB

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  • 512 GB total capacity from four 128 GB modules for dense server workloads
  • DDR5 4800 speed with CL40 latency delivers rated bandwidth without tuning
  • Registered ECC architecture corrects single-bit errors and stabilises fully populated slots
  • 1 V operation matches the Supermicro H13DSG-O-CPU memory controller specification
  • 288-pin RDIMM form factor fits the exact motherboard slot and population rules

Exact-match 512 GB kit for Supermicro H13DSG-O-CPU

This 512 GB kit contains four 128 GB DDR5 registered ECC RDIMMs that run at 4800 MHz with CL40 timing and 1.1 V. The 2Rx4 organisation and 288-pin form factor match the motherboard’s memory-controller expectations so the full capacity is recognised at rated speed.

Suited for fully populated server builds

Administrators expanding a Supermicro H13DSG-O-CPU system to its maximum supported DIMM count will benefit from the registered architecture that keeps every slot stable. Buyers who need unbuffered UDIMMs, SODIMMs, or a smaller total capacity should look elsewhere.

Steady throughput under continuous load

Registered buffering offloads the memory controller, allowing all four modules to sustain full-speed operation during long compute jobs. ECC corrects single-bit errors on the fly, preventing silent data corruption and unplanned reboots during extended production runs.

How it compares

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

Price $14,934.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $29.17 per GB
Pricier than about 83% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR38400-724K4
Total capacity512 GB (4 × 128 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
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items512 GB 4 × 128 GB DDR5 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Does the Supermicro H13DSG-O-CPU motherboard need a specific BIOS revision to recognise the 512 GB kit at DDR5-4800?

The kit is validated for that motherboard; consult the board manual for the minimum BIOS version that enables full 512 GB capacity at the rated 4800 MT/s speed.

Can I mix these 128 GB 2Rx4 RDIMMs with smaller DDR5 RDIMMs already installed in the same server?

Mixing different capacities or ranks is not recommended; the board's population rules require identical modules per channel to maintain stability and ECC integrity.

How do I confirm the system is using all 512 GB at CL40 1.10 V after installation?

Enter the BIOS or use a tool such as dmidecode to verify each slot shows 128 GB, 4800 MT/s, CL40 timing and 1.10 V operating voltage.

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