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Green rectangular SODIMM module with black memory chips and gold edge connectors

SK hynix

SK hynix HMA851S6CJR6N-VK 4GB DDR4 2666 SODIMM laptop RAM

SKU CH-KQS4-0TSMX

4 GB DDR4 SODIMM running at 2666 MT/s with 1.2 V operation in OEM packaging

  • 4 GB capacity expands laptop multitasking headroom
  • 2666 MT/s DDR4 speed accelerates data throughput
  • 2 V operation reduces system power draw
  • 260-pin SODIMM form factor fits standard laptop slots
  • Non-ECC unbuffered design suits consumer notebooks

4 GB DDR4 SODIMM for laptop upgrades

This SK hynix module delivers 4 GB of DDR4 memory in a single SODIMM kit. It runs at 2666 MT/s with a 0.75 ns cycle time and operates at 1.2 V. The non-ECC design targets mainstream laptop owners who need a straightforward capacity boost.

Check your laptop has a free 260-pin DDR4 slot

Verify the notebook accepts PC4-21300 SODIMMs and supports non-ECC memory at 1.2 V. The module arrives in OEM packaging without a retail box, so confirm the physical slot is accessible before ordering.

Suits users adding a single 4 GB stick

Ideal for repairing a failed module or expanding a system with one open slot. Buyers who want more storage capacity, dual-channel kits, ECC error correction or higher-speed memory should look at something else.

How it compares

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

Price $22.99
Cheaper than about 83% of the 2,079 comparable items (median $70.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What comes inside the OEM packaging and is anything else required?

The package contains only the 260‑pin SODIMM module. No screws, tools or additional cables are included, so nothing extra needs to be bought for installation.

How do I decide between this 4 GB stick and a larger capacity?

Choose the 4 GB module when a single slot is free and the system only needs a modest boost for everyday tasks; add a second stick later if the board supports dual‑channel.

What does the 2666 MT/s rating deliver in actual use?

At 2666 MT/s and 1.2 V the module runs at the standard PC4‑21300 data rate, giving typical DDR4 bandwidth for mainstream laptop workloads.

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