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Two green DDR4 UDIMM sticks, black chips, gold contacts

SK hynix

SK hynix HMA851U6DJR6N-XN 8GB (2x4GB) DDR4-3200 desktop RAM

SKU CH-F09V-AR745 MPN HMA851U6DJR6N-XN

A dual-channel kit of two unbuffered 4 GB DDR4 modules running at 3200 MT/s with CL22 latency

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Tested speed22
  • Buffer typeUnbuffered
  • 8 GB total capacity for everyday multitasking
  • Dual-channel 2×4 GB kit improves bandwidth
  • DDR4-3200 speed rated at PC4-25600
  • Low 1.2 V operation reduces power draw
  • 288-pin UDIMM fits standard desktop slots

8 GB DDR4-3200 dual-channel kit

This kit provides 8 GB of DDR4 desktop memory in two 4 GB unbuffered modules rated for 3200 MT/s at CL22. It is intended for mainstream PC builds or upgrades that need standard JEDEC performance without manual tuning.

Check 288-pin DDR4 slots and 1.2 V support

Verify that the motherboard has two free 288-pin DDR4 DIMM slots and runs memory at 1.2 V. The modules are unbuffered non-ECC UDIMMs, so they require a consumer desktop platform that accepts standard unregistered memory.

Steady throughput at rated JEDEC settings

Under sustained load the modules operate at their validated 3200 MT/s frequency with CL22 timings at the standard 1.2 V. No XMP profile or voltage increase is needed to maintain this throughput during extended workloads.

How it compares

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

Price $51.99
Cheaper than about 65% of the 3,647 comparable items (median $90.99).
Total capacity 8 GB (2 × 4 GB)
Lower than about 60% 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 nameHMA851U6DJR6N-XN
Total capacity8 GB (2 × 4 GB)
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
Tested speed22
ECC supportNo
Buffer typeUnbuffered

Questions about this item

What comes in the box and do I need to buy anything else to install the 288-pin modules?

The package contains two 4 GB DDR4 UDIMM modules giving 8 GB total. No extra parts are required; the sticks plug directly into standard desktop DIMM slots.

Should I choose the CL22 kit or a lower-latency version for my DDR4-3200 build?

This kit runs at DDR4-3200 with CL22 timings at 1.2 V. If your motherboard supports XMP or manual timing adjustment you can select a tighter-latency kit, otherwise this CL22 set will operate at the rated speed out of the box.

What does the PC4-25600 rating mean once the memory is running in my PC?

PC4-25600 indicates a peak transfer rate of 25 600 MB/s per module at DDR4-3200. In practice the system will read and write at up to that bandwidth when the memory controller requests it.

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