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Green bare circuit board DDR5 RDIMM 288-pin module no heat spreader

A-Tech

A-Tech 128GB DDR5 6400MHz ECC RDIMM 2Rx4 Server Memory

SKU CH-F6H3-M1VWF

128 GB DDR5 6400 MHz ECC registered server module with 2Rx4 organisation and 1.1 V operation

  • Total capacity128 GB
  • Rated speedDDR5 6400 (PC5 51200)
  • ChipsetMajor Brand Chipset
  • CAS latency32
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 128 GB capacity handles large server workloads
  • DDR5 6400 MHz speed delivers high data throughput
  • ECC RDIMM design protects data integrity in critical tasks
  • 2Rx4 rank organisation optimises memory density per slot
  • 10 V operation matches DDR5 standard for efficient power use

128GB DDR5 ECC RDIMM for servers

This 128GB DDR5 6400MHz registered DIMM provides error-correcting memory for server and workstation platforms. The single module uses a 2Rx4 organisation and operates at the standard 1.10V. It is built as a compatible replacement for IBM-Lenovo part numbers 4X77A90993, 4X77A93529 and 03NA217. Systems needing ECC RDIMM capacity can use this module to expand memory.

Thermals noise and power draw

The module runs at the DDR5 standard voltage of 1.10V without a heat spreader. Registered buffering and ECC functionality add minimal overhead to power consumption during normal operation. Passive cooling relies on system airflow across the bare PCB. Acoustic output is silent as the component has no moving parts.

128GB single module capacity

This kit contains one 128GB DDR5 6400MHz RDIMM with CAS latency 32 and 2Rx4 rank configuration. The 288-pin form factor fits DDR5 RDIMM slots in compatible server and workstation boards. Buyers who need multiple matched modules or a different total capacity should verify their platform requirements before ordering.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $3,969.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB
Higher than about 90% of the 6,064 comparable items (median 32 GB).
CAS latency 32
Lower than about 74% of the 439 comparable items (median 40).
Price per GB $31.02 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineCompatible Replacement for IBM-Lenovo 4 × 77A90993 4 × 77A93529 03NA217
Model nameA-Tech 128 GB DDR5-6400 ECC RDIMM Server RAM Module
Total capacity128 GB
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 6400 (PC5 51200)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latency32
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V

Questions about this item

How do I install the 288-pin DDR5 RDIMM and which step is often missed?

Align the notch on the 288-pin module with the slot key, press firmly until both retention clips click, then verify the 1.10V setting in BIOS for DDR5 6400 operation.

What maintenance or replacement will the 128GB 2Rx4 ECC module need over time?

No routine maintenance is required; ECC corrects single-bit errors automatically, and the module should only be replaced if the system logs uncorrectable memory errors.

What limit appears first when the RDIMM runs sustained workloads at 6400MHz?

The registered buffer and 1.10V DDR5 voltage ceiling constrain maximum stable throughput before thermal or signal-integrity limits are reached.

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