Samsung M321R2GA3EB2-CCP

M321R2GA3EB2-CCP Technical Overview

Samsung M321R2GA3EB2-CCP is a 16GB DDR5-6400 RDIMM with a 1Rx8 organization and ECC. The module name is PC5-51200R. Samsung builds both the DRAM and the finished server module, so this ordering code identifies a complete factory part.

Most requests start from the number on the label, or from a build that needs 16GB DDR5-6400 RDIMM 1Rx8. Send the exact part number when you have it. If you only know the specification, send capacity, speed, module type and rank.

How to Read This Part Number

• M321R — Samsung DDR5 RDIMM family
• 2GA3 — 16GB density with the x8 organization path
• EB2 — die and package revision
• CCP — DDR5-6400 speed grade

Use the full code on the quote. Nearby suffixes can look similar on the sticker but are not always the same module.

Key Specifications

Part Number: M321R2GA3EB2-CCP
Manufacturer: Samsung
Capacity: 16GB (1x 16GB)
Memory Type: DDR5 SDRAM
Module Type: RDIMM (Registered DIMM)
Speed: 6400 MT/s
Module Name: PC5-51200R
Rank / Organization: 1Rx8
Error Correction: ECC
Voltage: 1.1V
Pin Count: 288-pin
Form Factor: Standard-height DIMM

Before adding memory to a populated server, match these values against the modules already installed: capacity, DDR generation, RDIMM or LRDIMM, rank, organization, speed and voltage.

RDIMM vs LRDIMM

This module is an RDIMM. Mixing RDIMM and LRDIMM in the same population is usually not allowed. If the installed memory is LRDIMM, quote an LRDIMM equivalent, or send a photo of the current label.

Where This Module Is Used

• Replacing the same Samsung DDR5 RDIMM already in the server
• Entry and mid-size builds that specify 16GB DDR5-6400 RDIMM, 1Rx8
• Spare stock that calls out this exact code

The same Samsung module may also appear under an HPE, Dell, Cisco, Supermicro or Lenovo label. If you need the OEM-labeled stick, include that number on the quote as well.

Matching Related Modules

A different speed, rank, density, or RDIMM vs LRDIMM code is a different product. Before approving a substitute, match:

• 16GB
• DDR5-6400 / PC5-51200R
• RDIMM
• 1Rx8
• ECC
• 1.1V / 288-pin

What to Send for a Quote

1. Part number: M321R2GA3EB2-CCP
2. Quantity
3. Optional: server brand and model
4. Optional: photo of the module label
5. Or: 16GB + DDR5-6400 + RDIMM + 1Rx8

Mixed lists are fine, including other DDR4/DDR5 lines and OEM-labeled pulled memory.

FAQ

Is this an LRDIMM?
No. It is a Samsung DDR5 RDIMM. Confirm the installed type before ordering.

Can I order only a few pieces?
Yes. Orders can start at two modules.

What if the label ending looks slightly different?
Send a photo of the full label. We will confirm whether it is the same family before quoting.

Do you quote OEM-labeled versions too?
Yes. Include the HPE, Dell, Cisco, Supermicro or Lenovo number if the server needs that label.