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Green rectangular circuit board with gold edge connectors and black memory chips, no heat spreader

A-Tech

A-Tech 128GB DDR5 4800 ECC RDIMM Server RAM

SKU CH-X254-G28EV

128 GB DDR5-4800 ECC RDIMM with 4Rx4 rank, CL40 latency and 1.10 V operation for compatible HP/HPE servers

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor Brand Chipset
  • CAS latency40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 128 GB module expands server capacity for heavy workloads
  • DDR5 4800 MHz speed moves data fast with PC5-38400 bandwidth
  • ECC RDIMM with 4Rx4 rank detects and corrects memory errors
  • 1 V standard voltage keeps power draw low per module
  • Compatible replacement for HP/HPE P43334-B21 and related part numbers

High-Capacity Server Memory Upgrade

This A-Tech module delivers 128GB of DDR5 4800 ECC RDIMM capacity in a single 288-pin stick. It targets administrators expanding memory in compatible HP/HPE servers and workstations that require registered, error-correcting modules. The 4Rx4 organisation with 3DS/TSV stacking suits high-density configurations where maximum RAM per slot is essential.

Thermals Noise and Power Draw

Operating at the standard 1.1V DDR5 voltage, the module draws minimal power for its density and runs without a heat spreader. Registered buffering reduces electrical load on the memory controller, helping maintain stable thermals in densely populated chassis. Passive cooling relies on system airflow; no active noise is generated by the memory itself.

Upgrade Path and Value

The stick replaces HP/HPE part numbers including P43334-B21, P48503-001, P43336-0A1, P50313-B21, P56154-001, P43336-1A1, P64752-001 and P43336-6A1. It is not suited for desktop platforms, consumer motherboards or systems requiring unbuffered UDIMMs or lower-density ranks. Buyers needing non-ECC memory or speeds beyond 4800 MT/s should look elsewhere.

How it compares

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

Price $3,603.99
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 40
Typical for this category: the median of 439 items is 40.
Price per GB $28.16 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 HP/HPE P43334-B21 P48503-001 P43336-0A1 P50313-B21 P56154-001 P43336-1A1 P64752-001 P43336-6A1
Model nameA-Tech 128 GB DDR5-4800 ECC RDIMM Server RAM Module
Total capacity128 GB
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latency40
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
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 module with the slot key, press firmly until both retention clips click shut, then verify the 1.10V operating voltage is detected in the system BIOS before booting the OS.

What maintenance or replacement will the 128GB ECC RDIMM need over its service life?

No scheduled maintenance is required; the module uses major-brand DRAM ICs and ECC error correction handles single-bit errors transparently, so replacement is only necessary if a multi-bit failure is reported by the server management console.

What limit appears first when the 4Rx4 3DS module runs at 4800MHz under sustained load?

The CAS latency of 40 cycles becomes the primary timing constraint during continuous high-throughput workloads, as the registered buffer and 1.1V voltage ceiling prevent further frequency scaling.

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