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Green 288-pin DDR4 LRDIMM module with black chips, no heat spreader

SK hynix

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

SKU CH-J6N4-NTC5Q

8 GB DDR4-2400 LRDIMM with ECC and registered buffering for server stability

  • 8 GB capacity supports dense server configurations
  • DDR4-2400 speed delivers 2400 MT/s data rates
  • LRDIMM architecture reduces electrical load on the memory bus
  • ECC and registered operation protect data integrity
  • 35 V operation lowers power consumption per module

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.

Punti di forza

  • 8 GB capacity supports dense server configurations
  • DDR4-2400 speed delivers 2400 MT/s data rates
  • LRDIMM architecture reduces electrical load on the memory bus
  • ECC and registered operation protect data integrity
  • 35 V operation lowers power consumption per module

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Domande su questo articolo

How do I install this 288-Pin DDR4 LRDIMM and what step is often missed?

Align the notch with the slot key, press firmly until both latches click, then verify the 1.35V setting in BIOS so the module runs at its rated DDR4-2400 speed.

What maintenance or replacement will this registered ECC module need over time?

No routine maintenance is required; replace only if memory diagnostics report correctable ECC errors rising or the module fails to train at DDR4-2400 after reseating.

What limit appears first when this 1RX8 LRDIMM runs sustained workloads at DDR4-2400?

The 1.35V operating voltage and single-rank 1RX8 organisation cap sustained throughput at the rated PC4-2400T data rate before thermal or signal margins become a factor.

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