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Four green DDR5 RDIMM modules without heat spreaders in a kit

NEMIX RAM

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

SKU CH-F66W-N4P06

512 GB DDR5 server kit of four 128 GB ECC registered RDIMMs at 6400 MT/s, CL52, 1.1 V, 4Rx4, validated for Supermicro X14SDW-42C-SP9F

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 512GB 4X128GB

  • 512 GB total capacity with four 128 GB modules for maximum memory density
  • DDR5-6400 speed rated at PC5-51200 for high-throughput server workloads
  • Registered ECC design with 4Rx4 organisation corrects single-bit errors and buffers the memory bus
  • 10 V operating voltage and CL52 latency match the Supermicro X14SDW-42C-SP9F memory controller exactly
  • 288-pin RDIMM form factor fits the required server DIMM slots for verified fitment

Exact-match server memory upgrade

This NEMIX RAM kit delivers 512GB of DDR5 ECC Registered RDIMM memory across four 128GB modules. It is built for the Supermicro X14SDW-42C-SP9F motherboard and runs at 6400MHz with CL52 latency at 1.1V. The 4Rx4 registered design meets the board's memory-controller requirements for full-capacity recognition and rated-speed operation.

Verify motherboard population rules

Check your system or motherboard manual for supported capacities and the approved DIMM installation order before ordering. The board requires 288-pin Registered RDIMM modules, not UDIMM or SODIMM alternatives. Confirm that your BIOS version and CPU configuration allow all four slots to be populated at the rated DDR5 6400 speed.

Registered ECC stability for production workloads

The registered architecture buffers address and control signals, reducing electrical load on the memory controller when every slot is filled. On-die ECC detects and corrects single-bit errors in real time, preventing silent data corruption and unplanned reboots. No heat spreader is included, so ensure your chassis airflow meets the server's thermal design.

How it compares

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

Price $16,832.99
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 $32.88 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 numberMR51200-744K4
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 rank4Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items512 GB 4 × 128 GB DDR5 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

What does the 512GB 4x128GB kit contain and do I need anything else to install it?

The package includes four 128GB DDR5 6400MHz PC5-51200 4Rx4 1.1V CL52 288-pin ECC Registered RDIMM modules. No extra components are required; the kit is a direct drop-in upgrade for the Supermicro X14SDW-42C-SP9F motherboard.

Why choose the 512GB 4x128GB CL52 1.1V 4Rx4 RDIMM kit over other capacities?

This exact-match kit provides the precise rank, voltage, and timing the Supermicro X14SDW-42C-SP9F memory controller expects, so all four slots run at the full 512GB capacity and rated 6400MHz speed without population conflicts.

What does the DDR5 6400 (PC5-51200) headline speed mean once the modules are in my server?

The modules operate at 6400MHz with CL52 latency and 1.10V, delivering the full PC5-51200 bandwidth the motherboard supports when all four registered ECC DIMMs are populated per the board's memory-population rules.

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