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Two green DDR5 RDIMM modules without heat spreaders, 288 pins each

NEMIX RAM

NEMIX RAM 256GB (2×128GB) DDR5 4800 PC5-38400 CL40 1.1V 2Rx4 288-pin ECC RDIMM kit Supermicro H13SST-GC

SKU CH-ES9G-NY7A7

256 GB DDR5-4800 registered ECC RDIMM kit (2 × 128 GB, CL40, 1.1 V, 2Rx4) validated for the Supermicro H13SST-GC 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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  • Exact-match 256 GB kit installs at full rated DDR5-4800 speed
  • Registered ECC RDIMM design prevents silent data corruption under load
  • Verified fitment for Supermicro H13SST-GC motherboard
  • Dual-rank 2Rx4 organisation enables full-capacity population per slot
  • 10 V operation matches the board's memory-controller specification

256 GB DDR5 ECC RDIMM kit for Supermicro H13SST-GC

This 256 GB kit contains two 128 GB registered DDR5 modules built for the Supermicro H13SST-GC motherboard. The 288-pin RDIMM form factor matches the board's slot requirements exactly. Registered buffering and on-die ECC protect data integrity in multi-socket server workloads. It is not suited for desktops or workstations that accept only unbuffered UDIMMs.

2 × 128 GB at DDR5-4800 CL40 1.1 V 2Rx4

Each module runs at 4800 MT/s with a CAS latency of 40 at the standard 1.1 V. The dual-rank 2Rx4 organisation lets the memory controller address the full 256 GB across both slots. Population rules for the H13SST-GC determine whether additional kits can be added; consult the motherboard manual for supported configurations and slot order. Systems needing higher bandwidth or lower latency will require faster-rated modules.

Registered ECC RDIMM form factor decides

The 288-pin registered DIMM with ECC is the single specification that determines whether this kit works in your server. Only motherboards wired for DDR5 RDIMMs with registered buffering and error correction will recognise the modules at full capacity and rated speed. Verify the H13SST-GC memory population table before purchase.

How it compares

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

Price $7,834.99
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 $30.61 per GB
Pricier than about 88% 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

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Questions about this item

Will the 2Rx4 registered ECC DDR5-4800 modules work alongside other DDR5 RDIMMs already installed in the Supermicro H13SST-GC?

The board requires registered DDR5 RDIMMs. Mixing kits with different ranks, speeds, or voltages can prevent the system from training at 4800 MT/s. For reliable operation, populate all channels with identical 2Rx4 1.1V CL40 modules and follow the manual's population order.

How can I confirm the kit is running at DDR5-4800 with CL40 timings and ECC active after installation?

Enter the BIOS and verify the memory frequency reads 4800 MT/s, CAS latency shows 40, voltage is 1.10 V, and ECC status is enabled. The Supermicro POST screen also reports total capacity as 256 GB when both 128 GB modules are recognised.

What comes in the box and do I need any extra brackets or cables for the Supermicro H13SST-GC?

The kit contains two 128 GB DDR5 288-pin registered ECC RDIMMs. No heat spreaders, brackets, cables, or additional hardware are included. The modules install directly into the motherboard's DDR5 RDIMM slots.

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