Samsung 128GB DDR4 2666MHz PC4-21300 ECC LRDIMM Memory Module

The Samsung M386AAK40B40-CWD is a server memory module that offers 128GB of DDR4 capacity running at 2666MHz with ECC and a load-reduced design. Built on the PC4-21300 standard, it combines an onboard register with a dedicated data buffer, a choice that improves signal integrity when several modules share the same channel.

By operating at 1.2 volts, the module keeps power draw in check while still delivering consistent bandwidth. It uses an 8Rx4 organization and installs into a 288-pin LRDIMM slot, so integration is simple on any platform that lists ECC load-reduced support. Administrators can populate up to three of these DIMMs per channel, scaling memory pools well beyond what standard RDIMMs allow.

This capacity and stability make the module a natural fit for virtualization hosts, in-memory databases, big data analytics nodes, and computing clusters that rely on high throughput. If your workload needs large datasets to reside entirely in memory or your environment puts a premium on uptime, upgrading with this module helps the server handle more virtual machines, larger tables, or complex simulations without sacrificing reliability.

• 128GB DDR4 ECC memory running at 2666MHz
• Load-reduced architecture with onboard register and data buffer
• 8Rx4 rank configuration and x4 data width
• Operates at 1.2V for balanced performance and power efficiency
• 288-pin LRDIMM for servers that support ECC load-reduced modules