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Two bare green DDR5 RDIMM sticks, 288-pin, no heat spreader

NEMIX RAM

NEMIX RAM DDR5 256GB (2×128GB) 4800MHz ECC RDIMM Supermicro H13DSG-O-CPU

SKU CH-H2FA-7K4JT

A 256 GB DDR5 registered ECC kit of two 128 GB modules at 4800 MHz, CL40 and 1.1 V, validated for the Supermicro H13DSG-O-CPU motherboard

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

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  • 256 GB kit enables maximum server capacity
  • DDR5 4800 speed matches controller specification exactly
  • Registered ECC architecture prevents silent data corruption
  • 2Rx4 1.1 V modules fit Supermicro H13DSG-O-CPU slots
  • Lifetime replacement warranty covers the full kit

Server-grade DDR5 kit for Supermicro H13DSG-O-CPU

This 256 GB kit (2 x 128 GB) uses DDR5-4800 (PC5-38400) registered ECC RDIMMs built to the exact rank, voltage and timing the motherboard expects. It is intended for administrators who need the full 256 GB capacity recognised at rated speed without manual tuning.

Registered ECC limits and DDR5-4800 timing

The 2Rx4 registered architecture offloads the memory controller so every slot runs fully populated, while ECC corrects single-bit errors on the fly. CL40 latency and 1.1 V operation are fixed by the DDR5-4800 standard; the modules will not negotiate higher frequencies or lower latencies on this platform.

Bare-module build and 288-pin RDIMM fitment

No heat spreaders are fitted, so airflow in dense server chassis is unrestricted. The 288-pin RDIMM form factor matches the board's keying exactly — UDIMM or SODIMM modules cannot be installed. Verify the manual's population order before seating both DIMMs.

How it compares

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

Price $7,815.99
Pricier than about 84% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $30.53 per GB
Pricier than about 87% 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 numberMR38400-724K2
Total capacity256 GB (2 × 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 items256 GB 2 × 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

Should I choose the 256GB kit with two 128GB modules or a different capacity for my Supermicro H13DSG-O-CPU?

The 256GB kit provides two 128GB RDIMMs, matching the board's 288-pin DDR5 registered slots and 2Rx4 rank structure. Check your motherboard manual for approved population order and maximum supported capacity per slot before purchasing.

What does the 4800MHz speed mean once installed in the server?

The modules run at DDR5-4800 (PC5-38400) with CL40 latency at 1.1V. The registered buffer lets every slot operate at this rated speed when fully populated, while ECC corrects single-bit errors to prevent silent data corruption.

How does the 288-pin RDIMM interface limit what I can install?

This kit uses 288-pin DDR5 RDIMM form factor with registered buffering and ECC. It will not fit UDIMM or SODIMM slots, and the motherboard must support registered DIMMs with 2Rx4 organization at 1.1V for correct operation.

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