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

SK hynix

SK hynix HMA82GU6JJR8N-VK 4GB DDR4-2666 CL19 1RX16 desktop RAM

SKU CH-88WV-HFDA1

A 4 GB unbuffered DDR4 module running at 2666 MHz with CL19 latency and 1.20 V operation

  • Total capacity4 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • 4 GB capacity adds responsive multitasking headroom
  • DDR4-2666 speed moves data at 21300 MB/s bandwidth
  • CL19 latency keeps timing tight for everyday workloads
  • 20 V operation reduces power draw and heat
  • Single-rank 1Rx16 layout fits standard 288-pin desktop slots

4 GB DDR4-2666 Desktop Module

This single 4 GB UDIMM runs at DDR4-2666 with a CL19 latency and 1.20 V operation. It is aimed at office PCs or basic home systems that need a modest capacity boost without overclocking headroom.

Tool-free DIMM slot installation

Align the notch on the 288-pin module with the motherboard key and press down until the retention clips click. The most common issue is seating the stick unevenly so only one clip engages, which prevents the system from posting.

Check DDR4 slot availability and rank limits

Verify the board has a free DDR4 UDIMM slot and that its memory controller accepts 1RX16 single-rank modules. Some platforms restrict total rank count per channel, so confirm the existing population before ordering.

How it compares

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

Price $25.99
Cheaper than about 82% of the 3,647 comparable items (median $90.99).
Total capacity 4 GB
Lower than about 80% of the 3,251 comparable items (median 16 GB).
Price per GB $6.50 per GB
Typical for this category: the median of 3,251 items is $6.75 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 nameHynix
Product lineDesktop Memory
Model nameHMA82GU6JJR8N-VK
Total capacity4 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage1.2 V

Questions about this item

How do I verify the module is running at DDR4-2666 CL19 after installation?

Open Task Manager or CPU-Z and confirm the memory tab shows 2666 MHz and CL19 timings at 1.20 V.

What comes in the box and is anything else required?

One 288-pin UDIMM module is included; no extra cables or brackets are needed for a standard desktop DIMM slot.

Which capacity and rank should I choose for a single-slot upgrade?

This 4 GB 1RX16 stick fills one slot; add a second identical module later if your board supports dual-channel.

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