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Green printed circuit board with black memory chips and gold edge connector

SK hynix

SK hynix HMA851S6DJR6N-VK_UB accessory

SKU CH-TVRE-8V8K1 MPN HMA851S6DJR6N-VK_UB

A 4 GB DDR4 SO-DIMM laptop module running at 2666 MHz with CL19 latency and 1.2 V operation

  • 4 GB DDR4 capacity upgrades laptop performance
  • 2666 MHz speed matches PC4-21300 system bus
  • CL19 latency keeps timing stable at 1.2 V
  • Single-rank 1Rx16 layout fits standard SO-DIMM slot
  • 260-pin non-ECC module installs in compatible laptops

SK hynix 4 GB DDR4 SO-DIMM

This 4 GB DDR4 SO-DIMM module is built for laptops that accept 260-pin memory. It suits owners who need a straightforward capacity increase for everyday tasks such as web browsing, document editing and light multitasking. The Non-ECC design matches standard consumer notebook requirements.

DDR4-2666 PC4-21300 interface limits

The module runs at 2666 MHz with CL19 latency on the PC4-21300 bus. This speed ceiling is set by the DDR4 standard at this frequency; systems that only support lower DDR4 speeds will down-clock the module automatically. Platforms requiring ECC or registered DIMMs cannot use this stick.

4 GB capacity and headroom

A single 4 GB rank handles typical office workloads and streaming video without paging. Heavier workloads such as modern gaming, video editing or running multiple virtual machines will exhaust the available memory quickly. Buyers who want more storage for large datasets or need higher bandwidth for integrated graphics should look elsewhere.

Highlights

  • 4 GB DDR4 capacity upgrades laptop performance
  • 2666 MHz speed matches PC4-21300 system bus
  • CL19 latency keeps timing stable at 1.2 V
  • Single-rank 1Rx16 layout fits standard SO-DIMM slot
  • 260-pin non-ECC module installs in compatible laptops

Specifications

No published specifications for this item yet.

Questions about this item

Should I pick the 4 GB DDR4 SO-DIMM or a different capacity?

This module is a single 4 GB stick; choose it if your laptop has a free SO-DIMM slot and you need a modest capacity boost.

What does the 2666 MHz rating deliver once installed?

The memory runs at 2666 MHz with CL19 latency, giving standard DDR4 throughput for everyday workloads.

How does the PC4-21300 / 260-pin interface limit performance?

The 260-pin SO-DIMM edge connector matches the DDR4 SO-DIMM standard, so speed is capped at the module's rated 2666 MHz.

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