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Green printed circuit board with black memory chips and gold edge connectors

SK hynix

SK hynix HMA82GU7CJR8N-VK 16GB DDR4-2666 ECC UDIMM CL11 2Rx8 server RAM

SKU CH-YWFA-WMS9S

16 GB DDR4-2666 ECC UDIMM with CL11 latency and 2Rx8 organisation for server workloads

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL11
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 16GB capacity supports demanding server workloads
  • DDR4-2666 speed delivers high data throughput
  • CL11 latency enables responsive memory access
  • ECC protection detects and corrects data errors
  • Supermicro certified for validated compatibility

16GB DDR4-2666 ECC UDIMM

This 16GB DDR4-2666 ECC UDIMM module targets servers and workstations that require error-correcting memory. The unbuffered design fits platforms built for UDIMM slots. Supermicro certification confirms validated compatibility with qualified systems. It suits administrators upgrading or populating memory channels in supported configurations.

Thermals and power at 1.2V

Operating at 1.20V, the module reduces power draw compared to higher-voltage DDR4 variants. Standard JEDEC voltage helps limit heat output inside dense chassis. No active cooling is included, so system airflow must handle thermal dissipation. CL11 and CL19 latency figures reflect timing at the rated 2666 MT/s speed.

Build integration with 288-pin UDIMM

The 288-pin DDR4 UDIMM form factor requires matching motherboard slots and chipset support for ECC unbuffered memory. Each module provides a single 16GB rank configuration of 2Rx8 organization. Builders must verify platform qualification lists for population rules and maximum capacity per channel. No registered or load-reduced variants are compatible with this module type.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $123.99
Cheaper than about 60% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $7.75 per GB
Pricier than about 54% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameSK hynix
Model nameHMA82GU7CJR8N-VK
Total capacity16 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL11
ECC supportYes
Buffer typeUnbuffered
Memory rank2Rx8
Power
Rated voltage1.2 V

Questions about this item

How do I install this 288-pin DDR4 UDIMM and which orientation mistake should I avoid?

Align the notch on the module with the key in the 288-pin DDR4 slot, press straight down until both retention clips click, and do not force it backwards — the notch is offset so the module only fits one way.

What maintenance or replacement will this ECC UDIMM need over time?

No scheduled maintenance is required; the module has no moving parts or batteries, and replacement is only necessary if a memory test reports uncorrectable errors or the system fails to recognise the 16 GB capacity.

At what point does the CL11 latency or 1.20 V limit show up first during sustained workloads?

Under continuous load the CL11 timing at DDR4 2666 sets the minimum response delay, while the fixed 1.20 V supply caps headroom before thermal throttling or voltage scaling can occur.

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