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Green 288-pin DDR4 UDIMM module with black memory chips and gold edge connectors

SK hynix

SK hynix HMA82GU7CJR8N-VK 16GB DDR4 2666 ECC Unbuffered 2Rx8 Server RAM

SKU CH-JGBW-28C95

16 GB DDR4 2666 ECC unbuffered server memory with CL19 latency 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 prevents data corruption in critical workloads
  • 16GB capacity supports larger datasets and virtualisation
  • 2666 MT/s speed delivers high bandwidth for server tasks
  • 2V operation reduces power draw and heat output
  • Supermicro certified for validated compatibility and reliability

16 GB DDR4 2666 ECC UDIMM

This 16 GB DDR4 2666 ECC unbuffered module targets servers and workstations that require error-correcting memory. The 2Rx8 organisation and CL11 timing deliver 16 GB of registered-grade reliability in a standard UDIMM form factor. Supermicro certification confirms validation on qualified platforms.

Upgrade from non-ECC or lower-capacity DDR4

Replacing non-ECC modules adds single-bit error correction for data integrity in critical workloads. Moving from 8 GB sticks doubles capacity per slot without changing voltage or pin layout. The jump is worth it when ECC support is mandatory and slot count is limited.

Fits 288-pin DDR4 slots at 1.20 V

The module installs in any 288-pin DDR4 UDIMM socket that accepts 1.20 V unbuffered ECC memory. No extra cooling or register buffer is required, leaving headroom for additional DIMMs. Builders needing registered RDIMMs or higher speeds must select a different part.

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 this 288-pin DDR4 UDIMM fit a standard server memory slot?

Yes, the 288-pin DDR4 UDIMM form factor matches standard unbuffered server DIMM sockets.

What BIOS setting should I check when installing this CL19 ECC module?

Enable ECC support in the BIOS and verify the memory runs at 2666 MT/s with 1.20 V; a common mistake is leaving ECC disabled.

When should I consider replacing this 16 GB 2Rx8 kit?

Replace it if system logs report correctable ECC errors that increase over time or if the modules fail memory diagnostics.

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