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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

  • Capacity4GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • 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.

Highlights

  • 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

Specifications

BrandHynix
SeriesDesktop Memory
ModelHMA82GU6JJR8N-VK
Capacity4GB
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered

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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