SK hynix HMA81GR7AFR8N-UH 8GB DDR4-2400 LRDIMM 1RX8 ECC Registered 1.35V

Server-grade DDR4 LRDIMM

The SK hynix HMA81GR7AFR8N-UH is an 8 GB DDR4-2400 LRDIMM built for registered ECC server platforms. Its load-reduced architecture lowers electrical loading on the memory bus, allowing higher capacities per channel. The module operates at 1.35 V and uses a 288-pin interface with a 1Rx8 organisation. It suits administrators who need reliable error-correcting memory for virtualisation hosts or database nodes.

Thermals and power in normal use

Running at the standard 1.35 V, the module draws modest power and generates little heat without a heat spreader. Passive airflow inside a typical server chassis is sufficient to keep temperatures within specification. The registered buffer adds negligible latency while stabilising signal integrity across fully populated channels. Acoustic impact is zero because the component has no moving parts.

Build integration and constraints

The 288-pin form factor fits any DDR4 RDIMM/LRDIMM slot wired for registered operation. Systems must support load-reduced DIMMs and ECC; consumer or unbuffered platforms will not recognise the module. Mixing with standard RDIMMs is not supported by most server chipsets. The single-rank design leaves additional rank slots open for future capacity expansion within the same channel.