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Four green DDR5 RDIMM modules without heat spreaders in a 512GB kit

NEMIX RAM

NEMIX RAM 512GB 4x128GB DDR5 6400 CL52 1.1V 2Rx4 RDIMM ECC memory upgrade

SKU CH-DV3H-XAMVB

512 GB server memory kit with four 128 GB DDR5 6400 CL52 1.1 V 2Rx4 registered ECC RDIMMs for the Supermicro H14DSG-O-CPU motherboard

  • 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 for dense server workloads
  • DDR5 6400 speed with CL52 latency delivers rated bandwidth on compatible platforms
  • 10 V operation reduces power draw per module in fully populated systems
  • Registered ECC RDIMM design corrects single-bit errors and stabilises heavy memory loads
  • Verified fit for Supermicro H14DSG-O-CPU motherboard with 288-pin RDIMM slots

Exact-match capacity and speed

This kit delivers 512GB across four 128GB DDR5 6400 RDIMM modules at CL52 and 1.1V. It is built for the Supermicro H14DSG-O-CPU motherboard and other systems that require Registered ECC memory in this exact configuration. The 2Rx4 rank structure matches the controller expectations for full-capacity recognition.

Registered design and 288-pin fit

Registered buffering reduces electrical load on the memory controller so all four slots can run populated at rated speed. ECC corrects single-bit errors on the fly to prevent silent data corruption. The 288-pin RDIMM form factor installs only in compatible server DIMM slots; it will not fit UDIMM or SODIMM sockets.

Upgrade from smaller or slower kits

Replacing a lower-capacity or lower-speed RDIMM set with this kit adds the bandwidth and density needed for heavily threaded workloads. The jump is worthwhile when your current population leaves slots empty or forces a reduced frequency, and the board's qualified-vendor list includes this part number.

How it compares

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

Price $18,938.99
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 $36.99 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

What speed does the DDR5 6400 interface run at when all four 128GB RDIMMs are populated?

The kit is rated at DDR5 6400 (PC5-51200) with CL52 latency at 1.1V, and the registered architecture keeps every slot running at that speed when fully populated.

Will these 288-pin RDIMMs fit the Supermicro H14DSG-O-CPU motherboard's DIMM slots?

Yes, the 288-pin registered RDIMM form factor matches the board's required slot type and population rules exactly.

How do I install the 4x128GB kit correctly, and which step is most often missed?

Follow the motherboard manual's approved DIMM population order for all four slots; the step most often missed is verifying the exact slot sequence before inserting the modules.

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