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Four green server memory modules with gold contacts and silver heat spreaders

SAMSUNG

SAMSUNG 128GB 4x32GB DDR4 2666MHz RDIMM Server Memory

SKU CH-8CYC-2GWJ3

Four 32 GB DDR4 RDIMMs running at 2666 MHz deliver 128 GB of registered server memory

  • 128GB total capacity across four 32GB modules
  • Registered DDR4 design improves signal integrity for servers
  • 2666MHz speed with PC4-21300 bandwidth rating
  • RDIMM form factor fits standard server DIMM slots
  • Samsung M393A4K40CB2-CTD modules built for enterprise workloads

128GB DDR4 RDIMM kit

This Samsung kit supplies 128GB of registered DDR4 server memory across four 32GB modules. It targets administrators who need high-capacity, error-correcting RAM for multi-socket platforms.

Registered RDIMM form factor

Each DIMM carries part number M393A4K40CB2-CTD and operates at 2666MHz under the PC4-21300 specification. The registered buffer is the single attribute that determines compatibility with registered-only memory slots.

Four-module server population

The bundle fills four RDIMM slots in a single transaction, freeing the installer from sourcing matched sticks separately. It requires a motherboard that accepts registered DDR4 modules and cannot be used in systems limited to unbuffered UDIMM memory.

Punti di forza

  • 128GB total capacity across four 32GB modules
  • Registered DDR4 design improves signal integrity for servers
  • 2666MHz speed with PC4-21300 bandwidth rating
  • RDIMM form factor fits standard server DIMM slots
  • Samsung M393A4K40CB2-CTD modules built for enterprise workloads

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What does 2666MHz mean for actual server workloads?

The rated 2666MHz speed sets the maximum data rate the memory controller can use; real-world throughput depends on the platform's memory controller and how many channels it populates.

What does PC4-21300 tell me about the DDR4 interface?

PC4-21300 is the JEDEC designation for DDR4-2666; it defines the peak transfer rate the DIMMs are validated to reach on a compliant memory bus.

Will these RDIMMs fit in a standard server DIMM slot?

Each module uses the RDIMM form factor, which matches the keyed DDR4 DIMM sockets found in registered-memory server platforms.

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