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Green rectangular DDR4 DIMM with black chips and gold contacts

SK hynix

SK hynix HMA81GU6JJR8N-VK 8GB DDR4 2666 CL19 desktop RAM

SKU CH-S905-ARCBF

8 GB DDR4 desktop module rated PC4-2666V with CL19 latency and 1.2 V operation

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • 8 GB capacity adds responsive multitasking headroom
  • DDR4 2666 MHz speed delivers quick data throughput
  • CL19 latency keeps access times low
  • 2 V operation reduces power draw and heat
  • 288-pin DIMM fits standard desktop motherboard slots

8 GB DDR4 2666 module for desktop builds

This single-rank module delivers 8 GB of DDR4 memory at 2666 MHz with CL19 latency. It targets builders upgrading an existing desktop or assembling a new system that requires standard unbuffered non-ECC RAM.

288-pin DIMM with 1.2 V operation

The stick uses the standard 288-pin desktop form factor and runs at 1.20 V, matching typical motherboard memory slots without extra cooling or voltage tweaks. Unbuffered non-ECC design means it drops straight into consumer boards for everyday workloads.

CL19 timing at DDR4-2666

The CAS latency of 19 at 2666 MHz determines how quickly the module responds to read requests, making it the key figure for deciding if this stick matches your platform’s supported speed and latency profile.

How it compares

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

Price $48.99
Cheaper than about 66% of the 3,647 comparable items (median $90.99).
Total capacity 8 GB
Lower than about 60% of the 3,251 comparable items (median 16 GB).
Price per GB $6.12 per GB
Cheaper than about 57% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameHynix
Part numberHMA81GU6JJR8N-VK
Total capacity8 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage1.2 V

Questions about this item

Does the DDR4-2666 PC4-21300 rating cap the module at 2666 MHz in practice?

The module is rated for DDR4-2666 with a PC4-21300 bandwidth designation and will run at 2666 MHz when the platform supports that speed.

Will the 288-pin DIMM fit a standard desktop motherboard slot?

Yes, it uses the standard 288-pin DDR4 DIMM form factor used by desktop motherboards.

Is there a specific orientation step that people often miss when installing this stick?

Align the notch on the module with the key in the slot, press down evenly until both side clips click into place.

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