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Green rectangular circuit board with gold contacts and black memory chips

SAMSUNG

SAMSUNG M321R6GA0BB0-CQK 48GB DDR5 4800MHz EC8 RDIMM ECC Registered Server RAM

SKU CH-F9Z4-Y74G8 MPN M321R6GA0BB0-CQK

48 GB DDR5 server memory running at 4800 MHz with ECC and registered design for stable, high-capacity workloads

  • TypeMemory RAM
  • High 48 GB capacity handles demanding workloads
  • 4800 MHz DDR5 speed accelerates data throughput
  • Registered ECC design protects data integrity
  • Single-rank X4 layout optimises channel efficiency
  • 1 V operation reduces system power draw

Capacity and role

This 48 GB DDR5 registered DIMM is built for servers and workstations that need error-correcting memory. The single-rank X4 organisation and 288-pin form factor suit multi-channel configurations in enterprise platforms.

Thermals noise and power

Operating at 1.1 V, the module draws minimal power for its density, helping keep system thermals manageable in dense rack environments. Registered buffering reduces electrical load on the memory controller, contributing to stable, quiet operation.

Sustained load behaviour

At 4800 MHz (PC5-38400) the memory maintains rated throughput during extended compute tasks without downclocking. ECC correction handles single-bit errors transparently, preserving data integrity through long-running workloads.

Highlights

  • High 48 GB capacity handles demanding workloads
  • 4800 MHz DDR5 speed accelerates data throughput
  • Registered ECC design protects data integrity
  • Single-rank X4 layout optimises channel efficiency
  • 1 V operation reduces system power draw

Specifications

TypeMemory RAM
Shipping weight0.23 kg
Package size178 × 76 × 25 mm

Questions about this item

How do I install this 288-pin DDR5 RDIMM and which step is most often missed?

Align the notch on the module with the key in the 288-pin slot, press firmly until both retention clips click, then verify in BIOS that the module reports 4800 MHz and ECC active — skipping the BIOS check is the step most often missed.

What maintenance or replacement will this 48 GB registered ECC module need over its service life?

No scheduled maintenance is required; if a correctable error count rises or the module fails POST, replace the individual DIMM — registered ECC chips and the 1.1 V supply voltage are not user-serviceable.

What limit appears first when this PC5-38400 memory runs sustained workloads?

The JEDEC-defined 4800 MHz data rate and 1.1 V operating voltage set the thermal and signal-integrity ceiling; sustained loads will hit the 4800 MT/s transfer limit before any other constraint.

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