64GB DDR5-4800 RDIMM 2RX4 1.1V
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The SK hynix HMCG94MEBRA112N AA is an enterprise-grade 64GB DDR5-4800 dual-rank registered DIMM (2Rx4 RDIMM) engineered for high-density, mission-critical server environments. Operating at standard 1.1V with an onboard PMIC, it delivers up to 38.4 GB/s of bandwidth with enhanced channel efficiency and robust reliability.
The HMCG94MEBRA112N AA is built on SK hynix DDR5 SDRAM architecture utilizing 16Gb monolithic DRAM dies arranged in a dual-rank, x4 organization (2Rx4). Each DDR5 module splits the traditional 64-bit data bus into two independent 32-bit subchannels (each with 8-bit ECC overhead, creating two 40-bit channels) to significantly improve memory access concurrency and bus utilization. Buffering and clock distribution are handled by a standard JEDEC-compliant DDR5 Registered Clock Driver (RCD), ensuring command/address signal integrity under dense multi-DIMM channel loading.
Power architecture transitions from motherboard-regulated rails to an on-module Power Management IC (PMIC), which converts a 12V input directly on the DIMM to 1.1V (VDD/VDDQ) and 1.8V (VPP), improving electrical stability and reducing motherboard power routing complexity. The module incorporates an integrated SPD Hub with embedded thermal sensors for accurate telemetry. Reliability is reinforced via dual-layer error protection: on-die ECC handles internal bit-level cell flips, while traditional sideband ECC manages transmission integrity between the RDIMM and host memory controller. In the SK hynix part number, 'HMCG' denotes SK hynix DDR5 RDIMM, '94' represents 64GB 2Rx4, 'M' denotes component generation/die revision, 'EB' specifies DDR5-4800 (CL40) speed binning, and 'R' designates an RDIMM form factor.
Always verify against your server's qualified vendor list (QVL).
No. DDR5 RDIMMs have a different pin count, mechanical keying position, and electrical architecture (including an onboard PMIC) that make them completely incompatible with DDR4 slots.
DDR5 moves voltage regulation from the server motherboard onto the DIMM itself. The on-module PMIC receives 12V from the host board and converts it directly to 1.1V and 1.8V, allowing tighter voltage tolerances, reduced cross-talk, and improved power efficiency.
Yes. JEDEC DDR5 RDIMMs inherently feature two independent 32-bit subchannels (plus 8 ECC bits each) per physical module, effectively doubling the command and concurrency capability compared to a DDR4 single 64-bit channel.
The HMCG94MEBRA112N AA is a enterprise server memory module (64GB DDR5-4800 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 3 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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