48GB DDR5-6400 RDIMM 2RX8 1.1V
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The Samsung M321R6GA3PB2-CCPEF is an enterprise-grade 48GB DDR5-6400 PC5-51200 dual-rank registered ECC DIMM designed for high-density computing environments. Operating at 1.1V, this non-binary capacity RDIMM leverages high-efficiency 24Gb monolithic DRAM dies to optimize memory bandwidth and total cost of ownership. It is engineered for enterprise servers requiring high throughput, low latency, and robust fault tolerance.
The M321R6GA3PB2-CCPEF is constructed using Samsung 24Gb monolithic DRAM components in a 2Rx8 dual-rank configuration. Utilizing non-binary 24Gb die technology allows for 48GB capacities on a standard dual-rank footprint without requiring complex 3DS stacking. The module is split into two independent 32-bit subchannels (40 bits total per subchannel with ECC), substantially improving memory access concurrency and bus efficiency compared to legacy DDR4 architecture. Buffering is managed by a JEDEC-standard Registering Clock Driver (RCD), which re-drives command and address signals to maintain clean signal integrity across high-speed interconnects.
Power regulation is decoupled from the motherboard and managed locally on the module via an onboard Power Management IC (PMIC), which converts the 12V system rail to the necessary 1.1V VDD, VDDQ, and 1.8V VPP operating levels. Thermal telemetry and configuration storage are integrated into an SPD Hub with integrated thermal sensors. Data integrity is guarded by dual-layer protection: internal On-Die ECC (ODECC) mitigates internal DRAM bit errors, while sideband ECC handles transmission and system-level corrections via the host memory controller. The part number decodes to Samsung (M), DDR5 RDIMM (321), 48GB capacity class (R6G), 2Rx8 rank structure (A), 24Gb die generation (3), BGA packaging (P), B-die revision (B), standard PCB (2), lead-free/halogen-free (C), and DDR5-6400 CL52 speed bin (CP).
Always verify against your server's qualified vendor list (QVL).
Non-binary memory uses 24Gb DRAM dies instead of conventional power-of-two densities (16Gb or 32Gb). This provides intermediate memory capacities (like 24GB, 48GB, or 96GB per module), allowing data centers to achieve optimal channel-balanced capacities without paying the premium of higher-density stacked 3DS modules.
Yes, the module is backward-compatible with lower JEDEC speeds. When installed in systems supporting up to 4800 MT/s or 5600 MT/s, such as AMD EPYC 9004 or Intel 5th Gen Xeon processors, the SPD Hub automatically negotiates down to the maximum supported system bus speed.
Yes, utilizing 24Gb-based non-binary DDR5 memory modules requires server firmware/BIOS that supports non-binary memory mapping and correct timing parameters. Most Tier-1 enterprise server platforms have added this support in recent UEFI/BIOS updates.
The M321R6GA3PB2-CCPEF is a TAA-compliant enterprise server memory module (48GB DDR5-6400 RDIMM 2RX8 1.1V). Sold as factory-sealed OEM stock with a 1-year warranty and same-day US shipping when in stock. We stock 100 units of this SKU today.
Compatible with enterprise servers requiring this exact configuration. Bulk orders welcome — quotes typically returned within one business hour. Payment terms: NET-30 for approved accounts, or instant on-chain payment via USDC/ETH on Base or Ethereum for autonomous AI agents and Web3 buyers.
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