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Green rectangular DDR5 RDIMM module with black chips on both sides and gold edge connectors, no heat spreader

NEMIX RAM

NEMIX RAM DDR5 6400 128GB 4Rx4 CL52 1.1V ECC RDIMM memory upgrade

SKU CH-183P-817TC

128GB DDR5-6400 registered ECC RDIMM, CL52 at 1.1V, 4Rx4, validated for Supermicro X14SDW-64C-SP9F

  • Total capacity128 GB
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL52
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 128GB

Show 4 more
  • 128 GB capacity scales memory-heavy workloads
  • DDR5 6400 speed delivers rated bandwidth
  • CL52 latency matches controller timing
  • 10 V operation reduces power draw
  • 4Rx4 registered ECC corrects single-bit errors

Exact-match 128 GB DDR5-6400 server module

This NEMIX RAM RDIMM delivers 128 GB of DDR5-6400 (PC5-51200) capacity in a single 288-pin registered DIMM. It is built for the Supermicro X14SDW-64C-SP9F motherboard and matches the exact rank, voltage and timing the platform expects.

Registered ECC design with 4Rx4 organisation

The module uses a registered (buffered) architecture that offloads the memory controller, allowing every slot to run fully populated at rated speed. ECC corrects single-bit errors on the fly, while the 4Rx4 layout and 1.10 V operation meet the board's population rules without a heat spreader.

DDR5-6400 interface limits

The DDR5-6400 standard sets the maximum data rate at 6400 MT/s and the CAS latency at CL52 for this module. Registered ECC RDIMMs cannot be mixed with unbuffered UDIMMs or SODIMMs, and the motherboard manual must be consulted for supported capacities and 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 $4,006.99
Pricier than about 76% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $31.30 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 numberMR51200-744K1
Total capacity128 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 items128 GB DDR5 6400 MHz PC5-51200 4Rx4 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Does the DDR5 6400 interface cap at PC5-51200 bandwidth for this module?

Yes, the module runs at DDR5 6400 (PC5-51200) with CL52 latency and 1.10 V, matching the Supermicro X14SDW-64C-SP9F memory controller specification.

What physical slot and form factor does this 288-pin RDIMM require?

It fits a standard 288-pin DDR5 RDIMM socket; the registered design and 4Rx4 organisation mean the motherboard must support registered ECC DIMMs, not UDIMM or SODIMM.

What population order does the Supermicro X14SDW-64C-SP9F manual specify for a 128 GB 4Rx4 kit?

Install the DIMM in the slot sequence listed in the board manual for single-DIMM-per-channel population; the common mistake is skipping the prescribed slot and leaving the primary channel empty.

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