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Two green DDR4 UDIMM sticks with black chips and gold contacts

SK hynix

SK hynix HMA82GU6JJR8N-VK 8GB 2x4GB DDR4-2666 desktop RAM

SKU CH-7VZQ-78Q7W

Two 4 GB DDR4 UDIMMs running at 2666 MHz with 1.20 V unbuffered operation

  • Dual-channel kit doubles bandwidth with two matched 4 GB modules
  • DDR4-2666 speed moves data at 21300 MT/s for responsive multitasking
  • 20 V operation keeps power draw low and thermals manageable
  • 288-pin UDIMM form factor fits standard desktop DIMM slots
  • 1Rx16 single-rank layout simplifies memory-controller timing for broad compatibility

Kit composition

This kit contains two unbuffered UDIMM modules for a total of 8 GB. Each stick is a 4 GB DDR4 SDRAM module with a 1RX16 rank configuration and 288 pins. It is suited for standard desktop builds needing a basic dual-channel upgrade.

Upgrade context

The kit moves a system from single-channel to dual-channel operation at PC4-21300 speeds. The jump is worth it when the board has two free slots and the CPU memory controller supports the rated 2666 MT/s bus. It does not serve boards limited to lower DDR4 speeds or those requiring registered DIMMs.

Installation notes

Installation follows the standard UDIMM procedure: align the notch, press until the latches click, and verify the BIOS reports the correct speed. Problems usually appear when mixing these sticks with modules of different rank or voltage, or when the motherboard defaults to a lower JEDEC profile instead of the rated 1.20V setting.

Highlights

  • Dual-channel kit doubles bandwidth with two matched 4 GB modules
  • DDR4-2666 speed moves data at 21300 MT/s for responsive multitasking
  • 20 V operation keeps power draw low and thermals manageable
  • 288-pin UDIMM form factor fits standard desktop DIMM slots
  • 1Rx16 single-rank layout simplifies memory-controller timing for broad compatibility

Specifications

No published specifications for this item yet.

Questions about this item

What motherboard slot does this 288-pin UDIMM kit require?

The modules use the standard 288-pin DDR4 UDIMM form factor and fit any desktop board with DDR4 DIMM slots.

When should the 1.20 V modules be reseated or replaced?

Reseat if the system fails to POST or shows memory errors; replace only if errors persist after testing each 4 GB stick individually in a known-good slot.

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