A-Tech 128GB DDR4 2666 ECC RDIMM 2S4Rx4 1.2V Server Memory

Server Memory Upgrade

This A-Tech module delivers 128GB of DDR4 2666MHz registered ECC memory in a single 288-pin DIMM. It is built for servers and workstations that require error-correcting, buffered modules to maintain data integrity under heavy workloads. The 2S4Rx4 organisation with 3DS/TSV stacking enables this high density on one stick.

Registered ECC Design

The module operates at the standard 1.2V DDR4 voltage with CL19 latency and a registered buffer that reduces electrical load on the memory controller. Registered ECC RDIMM architecture suits multi-socket platforms where signal integrity and error detection are critical for uptime. A 262-pin form factor matches the mechanical slot specification for compatible systems.

Capacity Expansion Path

This part replaces IBM-Lenovo 7X77A01307 and 01DE977 modules, letting administrators add 128GB per slot without populating multiple lower-density DIMMs. The jump is worthwhile when the platform supports 3DS/TSV registered DIMMs and the application benefits from fewer occupied slots for future scaling. Buyers needing non-ECC unbuffered memory or lower voltages should look elsewhere.