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Four green DDR5 RDIMM modules without heat spreaders in a kit

NEMIX RAM

NEMIX RAM 512GB 4x128GB DDR5 6400 CL52 1.1V 2Rx4 ECC RDIMM Supermicro H13SRH

SKU CH-5GJM-K22XW

512 GB kit of four 128 GB DDR5 6400 CL52 ECC registered RDIMMs at 1.1 V, validated for Supermicro H13SRH motherboards

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 512 GB total capacity from four 128 GB modules
  • DDR5 6400 speed with CL52 latency at 1.1 V
  • Registered ECC RDIMM corrects single-bit errors automatically
  • 2Rx4 dual-rank organisation matches Supermicro H13SRH requirements
  • 288-pin RDIMM form factor fits the motherboard slots precisely

Exact-Match DDR5 Kit for Supermicro H13SRH

This 512GB kit contains four 128GB DDR5 6400 RDIMMs built to the exact rank, voltage and timing the Supermicro H13SRH memory controller expects. Registered ECC architecture lets every slot run fully populated at rated speed without down-clocking. It is not for builders using consumer motherboards that accept only unbuffered UDIMMs.

Registered ECC Architecture and Verified Fitment

The 2Rx4 registered design offloads the memory controller so all four modules operate at 6400 MT/s with CL52 latency at 1.10V. ECC corrects single-bit errors on the fly, preventing silent data corruption and unplanned reboots in production workloads. No heat spreader is included, matching the board's validated configuration.

288-Pin RDIMM Form Factor and 2Rx4 Rank

The 288-pin Registered DIMM form factor is the single specification that decides compatibility; this motherboard requires RDIMMs and will not accept UDIMM or SODIMM modules. The 2Rx4 organisation must match the platform's population rules for full-capacity recognition. Consult your system manual for approved DIMM population order before installation.

How it compares

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

Price $16,447.99
Pricier than about 91% 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 $32.12 per GB
Pricier than about 90% 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 numberMR51200-724K4
Total capacity512 GB (4 × 128 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL52
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 6400 MHz PC5-51200 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

Questions about this item

Will the 128 GB DDR5 RDIMM modules need a firmware update or heatsink replacement later?

The modules have no heat spreader and no firmware interface; they are passive DDR5 RDIMMs that do not require updates or heatsink changes.

What limit appears first when the 512 GB kit runs at 6400 MT/s continuously?

The memory controller on the Supermicro H13SRH board will reach its maximum supported capacity or channel population before the DDR5 6400 modules hit a speed or voltage ceiling.

How much heat and power do the four 1.10 V DDR5 RDIMMs produce under all-day load?

Each module operates at 1.10 V with no heat spreader, so total power draw and thermal output stay within standard DDR5 RDIMM limits for the H13SRH platform.

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