Samsung · M321R8GA0PB2-CCP
Samsung 64GB DDR5-6400 ECC RDIMM Server Memory
Samsung M321R8GA0PB2-CCP is a 64GB DDR5-6400 ECC Registered DIMM with a 2Rx4 organization. For servers and professional workstations that explicitly support DDR5 RDIMM. Actual speed depends on the CPU, motherboard, BIOS and DIMMs-per-channel configuration. Confirm the exact part and platform compatibility list before ordering.
- 64GB per module / DDR5-6400
- 2Rx4 rank and DRAM organization
- ECC Error correction + RDIMM Registered design
- 1.1V nominal / 288-pin DDR5 RDIMM
- Verify exact part, motherboard QVL and channel population
Published model specifications describe available options, not the delivered configuration.
Configurations & prices
Listed price: $2,639.67
Listed prices are indicative; confirm tax, stock, compatibility, lead time and service in a written quotation.
Specifications & selection notes
Core Specifications
| Manufacturer part number | M321R8GA0PB2-CCP |
|---|---|
| Module capacity | 64 GB |
| Memory generation | DDR5 SDRAM |
| Module type | ECC RDIMM（Registered DIMM / Registered DIMM） |
| Rated data rate | 6400 MT/s；Operating speed depends on platform and population rules。 / Actual rate depends on platform and DIMM population. |
| Rank and DRAM width | 2Rx4（2 Rank，x4 DRAM） |
| ECC Error correction ECC | Supports / Supported |
| Registered design | Supports；RDIMM / Supported; RDIMM |
| Nominal voltage | 1.1 V（Manufacturer/Authorized catalog family documentation；Platform conditions require confirmation / Manufacturer or authorized family literature; confirm platform conditions） |
| Connector pins | 288 pins（DDR5 RDIMM Family specifications / DDR5 RDIMM family specification） |
| Component composition | (4G x 4) x 40 |
Specification Notes
| Rated-speed note | 5600 / 6400 Means million transfers per second（MT/s），Not the memory clock MHz。 / 5600 / 6400 denotes mega-transfers per second (MT/s), not clock frequency in MHz. |
|---|---|
| Unverified exact-part details | Manufacturer data for this exact part number has not been obtained for CL、Dimensions、Weight and operating-temperature data，No assumption is made；Enquire for confirmation if required。 / Exact-part CAS latency, dimensions, weight and operating temperature have not been verified; confirm if required. |
Platform Compatibility and Installation
| Supported platform | Only for platforms that explicitly support DDR5 ECC RDIMM Servers or professional workstations。 / Only for servers or professional workstations explicitly supporting DDR5 ECC RDIMM. |
|---|---|
| BIOS CPU and BIOS | Check the processor memory controller、BIOS Version and system manufacturer QVL。 / Check the processor memory controller, BIOS version and system-vendor QVL. |
| Rank Capacity and rank | Check the individual module 64GB、2Rx4 And per-slot platform/Total capacity limits。 / Verify 64GB per module, 2Rx4, and platform per-slot/total capacity limits. |
| Channel population | Check DIMMs per channel against the system manual、Slot order and mixed-population restrictions；DIMM population may reduce operating speed。 / Follow DIMMs-per-channel, slot-order and mixing rules; additional DIMMs may reduce operating speed. |
| Non-interchangeable types | Do not treat DDR4、UDIMM、SO-DIMM Or MRDIMM As this model RDIMM Direct replacement。 / DDR4, UDIMM, SO-DIMM and MRDIMM are not direct substitutes for this RDIMM. |
| Ordering details | Provide the system/Motherboard Model、CPU Model、Exact part numbers of existing memory、Quantity and target capacity。 / Provide the system or motherboard, CPU, current memory part numbers, DIMM count and target capacity. |
Sources and Service Notes
| Source checked | 2026-09-17 |
|---|---|
| Evidence scope | Complete part number、Capacity、Data rate and Rank From Samsung's official historical index；The original exact-model URL currently redirects to the family page，A historical production flag does not represent current status。 / Exact part, capacity, rate and rank are from Samsung historical indexing; the old page now redirects to the family page. Historical lifecycle labels are not live status. |
| Manufacturer family page | https://semiconductor.samsung.com/dram/ddr/ |
| Image disclosure | Official DDR5 RDIMM Series illustration；Does not represent the label of this exact part number、Chip layout or shipping appearance。The specification card is a website-created information graphic。 / Official family illustration, not an exact-part label or shipment photo. Specification cards are website-produced explanatory graphics. |
| Compatibility | Verify the full part number before ordering、CPU、Motherboard QVL、BIOS And DIMMs-per-channel population rules。 / Confirm the exact part, CPU, motherboard QVL, BIOS and DIMMs-per-channel rules before ordering. |
| Availability and quotation | Price、Stock、Lead time and exact shipping part number require confirmation。 / Confirm price, stock, lead time and the exact supplied part. |
| Warranty and delivery | Warranty、Packaging、Condition and service scope are subject to the written quotation and contract。 / Warranty, packaging, condition and service scope are subject to the written quotation and contract. |
Product images
Images are references. Components, interfaces and the delivered configuration are specified in the quotation.
Enquire about M321R8GA0PB2-CCP
Provide quantity, workload and component requirements to confirm the configuration and quotation.