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Green bare circuit board DDR5 RDIMM module 288-pin 128GB ECC registered 4Rx4

A-Tech

A-Tech 128GB DDR5 4800 ECC RDIMM 4Rx4 server RAM

SKU CH-6R33-6A1HB

128 GB DDR5-4800 ECC RDIMM module with 4Rx4 rank and 1.10 V operation for server workloads

  • Total capacity128 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor Brand Chipset
  • CAS latency40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 128 GB capacity handles large server workloads
  • DDR5 4800 speed delivers high data throughput
  • ECC RDIMM with 4Rx4 rank ensures data integrity
  • 10 V operation matches DDR5 standard voltage
  • 288-pin registered DIMM fits compatible IBM-Lenovo systems

High-Capacity DDR5 Server Module

This 128GB DDR5 4800 ECC RDIMM targets server and workstation administrators who need maximum memory density per slot. The registered design and 4Rx4 organisation allow large-capacity configurations on platforms that support 3DS/TSV stacking. It replaces IBM-Lenovo part numbers 4X77A77034, 4X77A81443 and 03GX339.

Sustained Load Behaviour

Registered buffering and on-die ECC maintain data integrity during continuous, multi-threaded workloads such as virtualisation, in-memory databases or scientific computing. The module operates at the standard 1.10V DDR5 voltage and CAS 40 latency, delivering consistent throughput without the error accumulation seen in unbuffered non-ECC alternatives under prolonged stress.

Upgrade Context

This single 128GB DIMM suits systems that have free 288-pin slots and qualified support for 4Rx4 registered DDR5. It is not for platforms limited to 1Rx4 or 2Rx4 ranks, consumer desktop boards that accept only unbuffered UDIMMs, or buyers who need speeds above the JEDEC 4800 baseline.

How it compares

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

Price $3,724.99
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 $29.10 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 × 77A77034 4 × 77A81443 03GX339
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 much heat and power does the 128GB DDR5 4800 4Rx4 module generate under continuous server load?

The module runs at the standard DDR5 voltage of 1.10V and carries no heat spreader, so it relies on the chassis airflow that your server already provides for registered DIMMs.

What must my system already have to accept this 288-pin DDR5 RDIMM?

A motherboard with DDR5 RDIMM slots, a CPU memory controller that supports 4800 MT/s registered ECC memory, and a BIOS that recognises 4Rx4 3DS/TSV modules.

Can I mix this 4Rx4 DDR5 4800 stick with lower-rank DDR5 RDIMMs already in my server?

Mixing ranks is possible only if your platform’s memory controller and BIOS explicitly support mixed-rank populations; consult the system manual for approved configurations.

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