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Green rectangular DDR5 RDIMM with black memory chips and gold 288-pin edge connector

SAMSUNG

SAMSUNG M321R2GA3BB6-CQK 16GB DDR5-4800 1Rx8 ECC Registered RDIMM server RAM

SKU CH-P7WQ-V1WJ8 MPN M321R2GA3BB6-CQK

A 16 GB DDR5-4800 registered ECC RDIMM module with single-rank x8 organisation and 1.1 V operation

  • Total capacity16 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • Buffer typeRegistered
  • Memory rank1Rx8
  • 16 GB DDR5-4800 capacity for high-throughput server workloads
  • ECC registered design detects and corrects single-bit errors automatically
  • Single-rank 1Rx8 organisation optimises signal integrity at speed
  • 1 V operating voltage reduces power draw per module
  • 288-pin RDIMM form factor fits standard DDR5 server slots

16GB DDR5-4800 ECC Registered RDIMM

This Samsung module provides 16GB of DDR5 server memory operating at 4800 MT/s with a PC5-38400 rating. It uses a registered design with on-die ECC to maintain data integrity in multi-module configurations. The single-rank 1Rx8 organisation helps keep electrical loading low on dense platforms.

Verify DDR5 RDIMM slot support

Confirm that your motherboard accepts 288-pin DDR5 RDIMMs and explicitly supports registered ECC modules at 1.1V. Registered memory will not function in consumer boards that require unbuffered DIMMs. Check the qualified vendor list for this exact part number before ordering.

Suits DDR5 servers needing registered ECC capacity

Ideal for expanding memory in compatible DDR5 server platforms that require registered error-correcting modules. Not suitable for desktop PCs, laptops or workstations that use unbuffered DDR5 or earlier DDR generations. Buyers needing higher densities or different speeds should seek alternative modules.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $1,104.99
Pricier than about 81% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $69.06 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSAMSUNG
Model nameM321R2GA3BB6-CQK
Part numberM321R2GA3BB6-CQK
Total capacity16 GB
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Size & build
Shipping weight0.02 kg
Package size152 × 51 × 13 mm

Questions about this item

What comes in the box with the M321R2GA3BB6-CQK and what must be purchased separately?

The box contains a single 16GB DDR5-4800 registered ECC RDIMM. No cables, brackets or additional modules are included; buy extra sticks separately if more capacity is needed.

Which version should I choose if I need 1Rx8 organisation at 4800 MT/s?

This part number is a single-rank 1Rx8 module rated at DDR5-4800 (PC5-38400), so it matches that exact requirement without any alternative versions to select.

What does the 4800 MT/s rating mean once the module is installed in a server?

The memory will run at up to 4800 MT/s at 1.1 V, delivering PC5-38400 bandwidth with registered ECC operation for error correction in DDR5 server platforms.

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