Samsung M321RYGA0PB2-CCP 96GB DDR5-6400 ECC RDIMM: Specs, Alternatives and Buying Guide

Quick Answers: What Is the Samsung M321RYGA0PB2-CCP?

The Samsung M321RYGA0PB2-CCP is a 96 GB DDR5-6400 ECC Registered DIMM (RDIMM) rated at 6400 MT/s (PC5-51200) with 1.1 V nominal operation and CL52 CAS latency. It is organized as 2Rx4, meaning two ranks of x4 DRAM, in a 288-pin RDIMM form factor, and it is built from 40 FBGA 6Gx4 DDR5 DRAM devices that provide a 72-bit ECC data path (12GX72 organization). According to distributor documentation, the module is 100% JEDEC compliant.

The part is listed as active in the XAIPART product database with 99,999 units on hand and a minimum order quantity of 1 as of 2026-09-15. Every pricing tier in the database, from 1 piece through 1000 pieces, is listed at $0, which means pricing is quote-based rather than a fixed list price. Request a current quotation as of 2026-09-15 before committing to a build, because high-density DDR5 RDIMM pricing tracks DRAM supply conditions.

For buyers, the short compatibility answer is that this is a server-grade module. It targets enterprise rack servers, virtualization hosts, in-memory databases, high-performance workstations, AI inference and analytics servers, and cloud or hosting infrastructure. It does not belong in consumer desktop boards that expect UDIMM memory.

Ordering details, live pricing and quantity breaks are on the M321RYGA0PB2-CCP product page, and comparable server modules are grouped in the XAIPART DDR5 RDIMM server memory category.

Technical Guide: How Do You Design In and Deploy the M321RYGA0PB2-CCP?

Start With Platform and Firmware Compatibility

An RDIMM is not a UDIMM. The M321RYGA0PB2-CCP places a register clock driver and data buffers between the DRAM devices and the memory controller, which reduces electrical load on the command and address bus and enables both the 96 GB density and the 6400 MT/s speed. That architecture only works in platforms designed for registered memory: two-socket and four-socket x86 servers and professional workstations. Before ordering, confirm three things with your platform vendor: that the motherboard accepts RDIMM rather than UDIMM, that the BIOS enumerates 96 GB DDR5 RDIMM densities, and that the server model lists this part number on its qualified vendor list.

Capacity density is the specific firmware risk here. The 96 GB capacity is achieved with non-binary 24 Gb DDR5 DRAM dies, not 3DS stacking, so platforms that only validate binary densities may train the module at a lower capacity or refuse it. Confirm 24 Gb non-binary DDR5 support in the platform documentation before you buy a fleet.

Understand the Rank, Organization and ECC Architecture

2Rx4 means two ranks of x4-width devices, twenty devices per rank, which matches the 40 FBGA 6Gx4 DRAM packages in the verified specification. The x4 device width places more DRAM chips behind each rank and gives the memory controller finer interleaving granularity than x8 modules, which helps bandwidth-bound workloads with mixed read and write patterns. The module presents a 72-bit ECC data path under the 12GX72 organization code, so the data path carries 64 data bits plus 8 check bits; the ECC Registered design lets the platform correct single-bit errors rather than pass them to the operating system.

Account for the DDR5 Power Architecture

DDR5 moves voltage regulation onto the module. The M321RYGA0PB2-CCP runs at 1.1 V nominal with an on-module PMIC that regulates that rail locally, unlike DDR4 where the motherboard supplied the DRAM voltage. When you budget power and airflow for a fully populated server, treat each module as an independent 1.1 V load. Module-level power consumption for this part is [DATA_NEEDED: module power consumption].

Check the Timing and Bandwidth Math

Derived from the verified 6400 MT/s rating, the memory clock is 3200 MHz, so one clock cycle is 1/3200 MHz, or 0.3125 ns. At the verified CL52 CAS latency, that equals 52 x 0.3125 ns, or roughly 16.25 ns of column address strobe latency. The PC5-51200 designation corresponds to 51.2 GB/s on a 64-bit data path. Across the full 72-bit ECC path, 6400 MT/s x 72 bits gives 460.8 Gbit/s of raw transfer, about 57.6 GB/s. Use the 51.2 GB/s figure, not the raw ECC figure, when you model usable application bandwidth per module.

Plan DIMM Population Before You Buy

Capacity per slot is the whole point of a 96 GB RDIMM. The table below is derived directly from the verified 96 GB capacity per module.

Populate uniformly. The verified application data notes that mixing 96 GB modules with lower-capacity DIMMs can force all memory in the platform to a lower common speed, which discards the rated 6400 MT/s operation you paid for. Uniform population also preserves rated speed across all channels and keeps interleaving symmetric.

Run a Pre-Deployment Validation Checklist

• Confirm the platform supports RDIMM, not UDIMM.
• Confirm BIOS support for 96 GB and 24 Gb non-binary DDR5 DRAM.
• Confirm the part number appears on the server vendor qualified vendor list.
• Confirm the hypervisor or database vendor certifies 96 GB DDR5 RDIMM configurations on your model.
• Confirm uniform population across channels to hold 6400 MT/s.
• Confirm that third-party replacements are acceptable if you plan to mix vendors.

Related design guidance for buffer architectures is in the XAIPART DDR5 RDIMM versus LRDIMM selection guide.

Alternatives and Comparison: Which 96 GB DDR5-6400 RDIMMs Drop In?

Drop-in candidates fall into two groups: Samsung sibling part numbers that share the 96 GB non-binary DDR5 RDIMM architecture, and third-party replacement modules marketed specifically against this Samsung part number. Only the values shown below are verified in the XAIPART database; anything not stated is marked as needed data rather than estimated.

The Samsung M321RYGA0PB0-CWM and M321RYGA0BB0-CQK share the 96 GB DDR5 RDIMM class and the non-binary architecture but differ in DRAM die revision, silicon revision and speed bin, so server firmware that validates specific part numbers may reject a substitution even though the electrical class matches. The NEMIX RAM module is explicitly marketed as a compatibility-tested drop-in replacement matching the 2Rx4, 1.1 V, 288-pin Registered specification, and A-Tech lists a 96 GB DDR5-6400 PC5-51200R ECC RDIMM replacement as well. Both third-party options sit outside the server vendor qualified vendor list, which matters for production fleets and warranty terms.

One part number that is frequently confused with this module does not substitute for it: the M321R8GA0PB2-CCP is a 64 GB 2Rx4 DDR5-6400 RDIMM, so it cannot deliver 96 GB per slot. See the M321RYGA0PB0-CWM page for sibling-part availability.

Industry Insight: Lifecycle Status and Supply Situation

The XAIPART database lists the M321RYGA0PB2-CCP as active, with 99,999 units in stock and a minimum order quantity of 1 as of 2026-09-15. Those two facts define the current buying posture: the part is in production, not end-of-life, and it is available in single-unit quantities as well as volume. All five pricing tiers in the database, from 1 to 1000 pieces, are recorded at $0, which indicates quote-based pricing rather than a published list price. Treat any figure you see elsewhere as indicative only and confirm a live quotation as of 2026-09-15.

Distributor coverage is broad. The verified data names ServerSupply, Win Source, icDirectory and Neox Computers as server-memory distributors carrying the module, alongside replacement-memory vendors NEMIX RAM and A-Tech. icDirectory reported 33,600 pieces in stock as of September 14, 2026. Lead times vary by seller: some resellers quote 4 to 5 day delivery, while others ship from stock; large-volume orders for enterprise-density DDR5 RDIMMs may require factory allocation.

Market share, unit shipment volumes, DRAM contract price indexes and end-of-life roadmap dates for this specific part number are not present in the verified data set. [DATA_NEEDED: market share and unit shipment data for 96 GB DDR5 RDIMMs]. [DATA_NEEDED: published end-of-life or product longevity commitment for M321RYGA0PB2-CCP]. What can be stated with confidence is the lifecycle state (active), the database stock position (99,999 units) and the quote-based pricing structure, all as of 2026-09-15.

Trends and Outlook: What Should Buyers Watch?

Non-binary DRAM density is the new compatibility frontier. The M321RYGA0PB2-CCP reaches 96 GB using non-binary 24 Gb DDR5 DRAM dies rather than 3DS stacking, and the architecture is built around 40 FBGA 6Gx4 devices with a 12GX72 ECC path. As density per DIMM rises, firmware validation for non-binary densities becomes the gating factor in upgrade planning, not the electrical interface.

6400 MT/s has become the speed to standardize on. With PC5-51200 rated bandwidth at 51.2 GB/s on a 64-bit path, the module supplies the memory throughput that bandwidth-sensitive workloads such as AI inference, analytics and virtual desktop infrastructure need. Buyers should standardize on uniform 6400 MT/s population rather than mixing speed bins, because mixed population can pull the whole platform down to a lower common speed.

Pricing will keep moving. With all database tiers recorded at $0 as of 2026-09-15, every purchase is a negotiated quotation. Enterprise-density RDIMM prices fluctuate with DRAM supply, so lock quantities and delivery dates rather than budgeting from historical prices.

Third-party replacements will keep expanding. NEMIX RAM and A-Tech already list 96 GB DDR5-6400 Registered replacements aimed at this exact Samsung part number. These are attractive for cost and lead-time reasons, but they sit outside OEM qualified vendor lists, so keep a validation step in your procurement process.

Register versus load-reduced architectures will remain a design choice. This module sits above UDIMM and SODIMM in capacity and reliability and below LRDIMM in load reduction, which makes it the mainstream choice for two-socket and four-socket servers. Buyers who need heavier bus load reduction should model LRDIMM options separately. See the RDIMM versus LRDIMM comparison for that evaluation.

Watch the platform list, not just the part number. Because firmware can validate specific Samsung part numbers, the practical trend is that upgrade projects succeed or fail on the qualified vendor list. Confirm platform support for 24 Gb non-binary DDR5 DRAM and 96 GB RDIMM densities before you place a volume order, and revalidate on the M321RYGA0PB2-CCP product page as stock and pricing change.