Samsung M321R4GA3PB2-CCP

Samsung M321R4GA3PB2-CCP Technical Overview

Samsung M321R4GA3PB2-CCP is a 32GB DDR5-6400 RDIMM with a 2Rx8 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 32GB DDR5-6400 RDIMM 2Rx8. 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
• 4GA3 — 32GB density with the x8 organization path
• PB2 — die and package revision
• CCP — DDR5-6400 speed grade

Use the full code on the quote. Nearby codes such as EB2 revisions can look similar on the sticker but are not automatically the same ordering part. Also check rank: other 32GB modules may be 1Rx4.

Key Specifications

Part Number: M321R4GA3PB2-CCP
Manufacturer: Samsung
Capacity: 32GB (1x 32GB)
Memory Type: DDR5 SDRAM
Module Type: RDIMM (Registered DIMM)
Speed: 6400 MT/s
Module Name: PC5-51200R
Rank / Organization: 2Rx8
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
• Upgrades that specify 32GB DDR5-6400 RDIMM, 2Rx8
• Builds and spare stock that call 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, organization, revision, or RDIMM vs LRDIMM code is a different product. Before approving a substitute, match:

• 32GB
• DDR5-6400 / PC5-51200R
• RDIMM
• 2Rx8
• ECC
• 1.1V / 288-pin

Do not treat a 32GB 1Rx4 module as a drop-in for this 2Rx8 part unless the server documentation allows it.

What to Send for a Quote

1. Part number: M321R4GA3PB2-CCP
2. Quantity
3. Optional: server brand and model
4. Optional: photo of the module label
5. Or: 32GB + DDR5-6400 + RDIMM + 2Rx8

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.

Is this the same as M321R4GA3EB2-CCP?
Same capacity, speed and 2Rx8 organization class, but a different revision code. Quote the exact number on your label, or send a photo for confirmation.

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

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