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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

  • Capacity128GB
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS Latency40
  • Voltage1.10V
  • ECCYes
  • 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.

Highlights

  • 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

Specifications

BrandA-Tech
SeriesCompatible Replacement for IBM-Lenovo 4X77A77034 4X77A81443 03GX339
ModelA-Tech 128GB DDR5-4800 ECC RDIMM Server RAM Module
Capacity128GB
Type288-Pin DDR5 RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS Latency40
Voltage1.10V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
ChipsetMajor Brand Chipset
Heat SpreaderNo
FeaturesMajor Brand DRAM IC Chips

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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