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Green rectangular circuit board with gold contacts and black memory chips

SK hynix

SK hynix HMA851U6DJR6N-XN 4GB DDR4-3200 desktop RAM

SKU CH-Z5G7-BWA98 MPN HMA851U6DJR6N-XN

4 GB unbuffered DDR4 desktop module running at 3200 MHz with CL22 latency and 1.20 V operation

  • Total capacity4 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • 4 GB single module upgrades entry desktops instantly
  • DDR4-3200 speed delivers responsive multitasking performance
  • CL22 latency keeps everyday tasks running smoothly
  • 2 V operation reduces system power draw
  • 288-pin UDIMM fits standard desktop memory slots

SK hynix 4 GB DDR4-3200 UDIMM

This module is a single 4 GB DDR4 UDIMM rated at 3200 MT/s with CL22 latency. It operates at 1.2 V and uses the standard 288-pin desktop form factor. The part is unbuffered and non-ECC, making it a straightforward drop-in upgrade for compatible boards.

Suits budget builds or simple capacity additions

Systems that need only a modest capacity increase will find this 4 GB stick adequate. Builders targeting dual-channel performance should add a second identical module. Users requiring ECC error correction, registered buffering, or higher single-module density must select a different specification.

3200 MT/s DDR4 speed rating determines fit

The module runs at DDR4-3200 (PC4-25600) with a CAS latency of 22. A motherboard that cannot accept DDR4 at this data rate will not work with this part. Verify the board's supported memory speeds before purchase.

How it compares

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

Price $49.99
Cheaper than about 66% 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 $12.50 per GB
Pricier than about 78% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameHynix
Product lineDesktop Memory
Model nameHMA851U6DJR6N-XN
Total capacity4 GB
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportNo
Buffer typeUnbuffered
Power
Rated voltage1.2 V

Questions about this item

Does the 1.20 V operating voltage of this DDR4-3200 module keep heat and power draw low during all-day use?

Yes — at the standard 1.20 V the 4 GB stick draws minimal power and runs cool enough for continuous desktop workloads without extra cooling.

What motherboard slot and memory controller do I need to install this 288-pin UDIMM?

A desktop board with a DDR4 memory controller and a free 288-pin DIMM slot is required; the module is unbuffered and non-ECC, so it fits standard consumer sockets.

Will the CL22 DDR4-3200 stick down-clock automatically when paired with slower DDR4 modules already in my system?

The module follows JEDEC SPD profiles, so the memory controller will negotiate the highest common speed and latency across all populated slots.

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