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Green rectangular circuit board with gold edge connectors and black memory chips on both sides

SK hynix

SK hynix HMA82GU7CJR8N-VK 16GB DDR4-2666 ECC UDIMM CL19 2Rx8 1.2V

SKU CH-A23X-VPMER

16 GB DDR4 2666 ECC UDIMM with CL19 latency, 2Rx8 dual-rank layout and 1.2 V operation

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL11
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • ECC protection guards data integrity with error-correcting code
  • 16 GB capacity expands server memory for demanding workloads
  • DDR4-2666 speed delivers 21300 MB/s peak bandwidth
  • 2 V operation reduces power draw versus older DDR generations
  • Dual-rank 2Rx8 layout increases memory density per slot

16GB DDR4-2666 ECC UDIMM for server builds

This SK hynix module delivers 16GB of DDR4 2666 memory with ECC error correction. It is built for servers and workstations that require data integrity and unbuffered operation. The dual-rank 2Rx8 organisation supports higher density per slot. It runs at a standard 1.2V.

Check motherboard support for unbuffered ECC UDIMMs

Verify that your platform accepts 288-pin DDR4 UDIMMs with ECC and unbuffered signalling. Registered or load-reduced modules are not compatible with this stick. Confirm the board can run at 2666 MT/s or will downclock automatically. Ensure enough free DIMM slots exist for the desired total capacity.

Fits standard 288-pin DDR4 slots in server boards

The module installs directly into any DDR4 UDIMM slot wired for ECC. No extra cooling or power connectors are required beyond the slot itself. ECC frees the system from silent data corruption risks. Unbuffered design keeps latency low for responsive workloads.

How it compares

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

Price $122.99
Cheaper than about 61% 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 $7.69 per GB
Typical for this category: the median of 6,064 items is $7.25 per GB.

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

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

Does the 288-pin DDR4 module come alone or with any extra parts?

The box contains the single 16 GB UDIMM; no cables, brackets or additional components are included.

What is the difference between the CL11 and CL19 figures shown for this module?

The manufacturer highlights list CAS latency 19; the CL11 value appears in the specification table but the rated timing for this part is CL19.

What does the PC4-21300 rating tell me about real-world throughput?

It marks the module’s peak data rate of 21300 MT/s at DDR4-2666, which the memory controller can utilise when the system runs at that speed.

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