64GB DDR5-6400 RDIMM 2RX4 1.1V
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The Samsung M321R8GA0EB2-CCP is an enterprise-grade 64GB DDR5-6400 dual-rank registered DIMM (RDIMM) engineered for next-generation server platforms. Operating at 1.1V, this high-bandwidth memory module delivers up to 51.2 GB/s per channel with advanced reliability features including on-die and sideband ECC. Designed for intensive enterprise workloads, it provides superior power efficiency, channel concurrency, and signal integrity for modern multi-socket architectures.
The Samsung M321R8GA0EB2-CCP is built on the JEDEC DDR5 standard using monolithic 16Gb Samsung DRAM chips (E-die). The module utilizes a 2Rx4 (dual rank, x4 organization) topology comprising 36 individual DRAM packages distributed across both ranks to support full sideband error correction code (ECC) alongside internal on-die ECC (ODECC). In DDR5 architecture, the standard 64-bit data bus is bifurcated into two independent 32-bit subchannels (each with an additional 8 bits for ECC, totaling 40 bits per subchannel), significantly reducing memory access latency and improving bus efficiency.
Buffering and clock distribution are handled by a high-speed JEDEC-compliant DDR5 Registering Clock Driver (RCD), which conditions command and address signals to minimize capacitive bus loading on the host memory controller. The module incorporates an on-DIMM Power Management IC (PMIC) to convert host 12V input directly down to VDD (1.1V), VDDQ (1.1V), and VPP (1.8V), ensuring tighter voltage regulation and lower power dissipation compared to motherboards using traditional VRMs. A dedicated SPD Hub integrates non-volatile memory with embedded thermal sensors for real-time telemetry. In the part number string, 'M321' signifies Samsung DDR5 RDIMM, 'R8G' designates a 64GB 2Rx4 density mapping, 'E' identifies the 16Gb E-die generation, 'B' represents packaging, and 'CCP' specifies JEDEC DDR5-6400 timing parameters (CL52-52-52).
Always verify against your server's qualified vendor list (QVL).
Yes, the module is fully backward-compatible with lower JEDEC speed tiers. When installed in systems supporting only DDR5-5600 or DDR5-4800, the SPD hub automatically renegotiates clock speed and CAS latencies down to the maximum speed supported by the host CPU and motherboard.
On-die ECC (ODECC) is internal to each DRAM chip and corrects single-bit errors inside the memory array to improve die yields at dense nodes. The sideband ECC supported by this x4 RDIMM utilizes extra parity chips allowing the host memory controller to detect and correct data corruption occurring across the external memory bus.
No, DDR5 RDIMMs feature a unique 288-pin mechanical notch position incompatible with DDR4 slots, and they cannot be used in consumer motherboards requiring unbuffered DIMMs (UDIMMs) due to distinct signaling and PMIC requirements.
The M321R8GA0EB2-CCP is a enterprise server memory module (64GB DDR5-6400 RDIMM 2RX4 1.1V). Sold as factory-sealed OEM stock with a 1-year warranty and same-day US shipping when in stock. We stock 0 units of this SKU today, with 250 more incoming.
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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