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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

  • Capacity512GB (4 x 128GB)
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 6400 (PC5 51200)
  • CAS LatencyCL52
  • Voltage1.10V
  • ECCYes
  • 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.

Highlights

  • 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

Specifications

BrandNEMIX RAM
SeriesNEMIX RAM Original Series Server Memory
ModelDDR5 ECC RDIMM Registered Server Memory
Part NumberMR51200-724K4
Capacity512GB (4 x 128GB)
Type288-Pin DDR5 RDIMM
SpeedDDR5 6400 (PC5 51200)
CAS LatencyCL52
Voltage1.10V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
ChipsetMajor OEM Samsung, Micron, Hynix
Heat SpreaderNo
Compatible SystemSupermicro
FeaturesDDR5 ECC RDIMM Motherboard Compatible
Package Content512GB 4X128GB DDR5 6400MHz PC5-51200 2Rx4 1.1V 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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