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Green rectangular circuit board with gold edge contacts and black memory chips, no heat spreader

OWC

OWC 16GB DDR4-2666 CL19 1.2V UDIMM HP Omen X 900 memory upgrade

SKU CH-V1J4-A99NN

16 GB DDR4-2666 CL19 UDIMM for HP Omen X 900 desktops, 1.2 V non-ECC upgrade

  • Capacity16GB
  • Type288-Pin DDR4 Non-ECC UDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCNo
  • 16 GB module expands system memory for smoother multitasking
  • DDR4 2666 MHz CL19 timing matches HP Omen X 900 specifications
  • 2 V operation keeps power draw low and heat minimal
  • 288-pin unbuffered non-ECC UDIMM fits the listed HP Omen X models directly
  • JEDEC and RoHS compliant for a warranty-safe upgrade

HP Omen X 900 upgrade

This 16 GB DDR4 module is built specifically for HP Omen X 900 desktops including the 900-250ng, 900-251ng, 900-280nz, 900-284nz and 900-290 models. It runs at 2666 MHz with CL19 timing at 1.2 V. The unbuffered, non-ECC UDIMM fits the standard 288-pin desktop slot.

Installation experience

The stick drops into a regular DIMM socket and locks with the side clips — no tools required. Because it is unbuffered and non-ECC, the firmware usually recognises it at 2133 MHz or 2400 MHz until XMP or manual timing is set. A common issue is forgetting to seat both ends evenly, which causes a no-post condition.

Suitability guide

Ideal for owners of the listed Omen X 900 systems who want a straightforward capacity increase. Builders using other motherboards, anyone needing ECC or registered memory, or users who require speeds above 2666 MHz should look at something else.

Highlights

  • 16 GB module expands system memory for smoother multitasking
  • DDR4 2666 MHz CL19 timing matches HP Omen X 900 specifications
  • 2 V operation keeps power draw low and heat minimal
  • 288-pin unbuffered non-ECC UDIMM fits the listed HP Omen X models directly
  • JEDEC and RoHS compliant for a warranty-safe upgrade

Specifications

BrandOWC
Part Number2U6D42R816GB
Capacity16GB
Type288-Pin DDR4 Non-ECC UDIMM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
Heat SpreaderNo
Compatible SystemHP OMEN X 900-250ng
HP OMEN X 900-251ng
HP OMEN X 900-280nz
HP OMEN X 900-284nz
HP OMEN X 900-290

Other versions of this model

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Questions about this item

How do I verify the 16GB DDR4-2666 CL19 module is running correctly after installing it in my HP Omen X 900?

After installation, enter the BIOS or use Windows Task Manager to confirm the memory is detected at 16GB, 2666MHz and CL19 timing. The system should boot without errors and show the full capacity in system information.

What comes in the box with the OWC 2U6D42R816GB UDIMM and what extra parts are needed?

The box contains the single 16GB 288-pin DDR4 UDIMM module. No additional cables, brackets or tools are required for installation in a compatible HP Omen X 900 desktop.

Which capacity version of this OWC DDR4-2666 memory should I choose for my HP Omen X 900-280nz?

This listing is for the 16GB module (part 2U6D42R816GB). Select this version if you need a single 16GB stick; add multiple units to reach your desired total capacity up to the motherboard limit.

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