8GB DDR5-5600 UDIMM 1RX16 1.1V
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The SK hynix HMCG66AGBUA084N AA is an 8GB single-rank DDR5-5600 unbuffered non-ECC memory module (UDIMM) designed for client workstations, edge computing nodes, and entry-level microservers. Operating at a baseline 1.1V with PC5-44800 bandwidth, it delivers high-frequency throughput and power efficiency for DDR5-capable desktop and workstation architectures.
The HMCG66AGBUA084N AA is built on SK hynix DDR5 DRAM technology utilizing a single-rank 1Rx16 architecture populated with four 16Gb monolithic DRAM dies. In accordance with JEDEC DDR5 UDIMM standards, the module is unbuffered (no Register Clock Driver or Data Buffers) and interfaces directly via a 288-pin connector. DDR5 moves power management from the motherboard to the module via an onboard Power Management IC (PMIC) operating with an SPD Hub containing an integrated thermal sensor to monitor temperature and regulate VDD, VDDQ (1.1V), and VPP (1.8V) power rails. While it features native On-Die ECC (ODECC) within each individual DRAM chip to correct single-bit errors inside the die, it lacks module-level sideband ECC DRAM devices (64-bit subchannels instead of 72/80-bit ECC buses). The part number decodes as: HM (SK hynix Memory), C (DDR5), G (UDIMM non-ECC), 6 (8GB density), 6 (x16 organization), A (A-die generation), GB (Package/revision code), UA (UDIMM form factor), 084 (DDR5-5600 speed bin), and N (commercial temp/standard).
Always verify against your server's qualified vendor list (QVL).
No, the HMCG66AGBUA084N is a standard non-ECC UDIMM with a 64-bit bus interface. While DDR5 includes native On-Die ECC to remediate internal array bit flips, it does not provide sideband ECC protection for data in-transit across the memory bus.
No, UDIMMs and RDIMMs (Registered DIMMs) are electrically and architecturally incompatible. Enterprise rackmount servers requiring RDIMMs will not post with unbuffered DIMMs.
A 1Rx16 layout provides an economical entry capacity by using only four 16-bit wide DRAM dies. Because x16 devices have fewer bank groups than x8 devices, it delivers standard entry-level performance suitable for mainstream computing rather than maximum-throughput multi-threaded enterprise workloads.
The HMCG66AGBUA084N AA is a TAA-compliant enterprise server memory module (8GB DDR5-5600 UDIMM 1RX16 1.1V). Sold as certified refurbished with a 1-year warranty and same-day US shipping when in stock. We stock 13 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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