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Green 288-pin DDR4 UDIMM module with black chips no heat spreader

OWC

OWC 2U6D42R816GB 16GB DDR4 2666 CL19 1.2V 288-Pin UDIMM for HP Pavilion 590

SKU CH-FQAM-K2MC9

A 16 GB DDR4 2666 CL19 UDIMM that adds memory to HP Pavilion 590 desktops

  • Capacity16GB
  • Type288-Pin DDR4 Non-ECC UDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCNo
  • 16GB DDR4 boosts multitasking on HP Pavilion 590 models
  • 2666MHz CL19 speed matches factory spec for reliable operation
  • 2V low voltage reduces power draw and heat
  • 288-pin UDIMM fits desktop slots without adapters
  • Backward compatible with 2133MHz and 2400MHz systems

Compatible HP Pavilion 590 models

This 16GB DDR4 UDIMM is built for HP Pavilion 590 desktops including the 590-p0099nb, 590-p0099nl, 590-p0305ns, 590-p0556ng and 590-p0557ng. It installs in a standard 288-pin slot and runs at 1.2V without ECC or buffering.

Who should buy and who should not

Owners of the listed Pavilion 590 systems who want a straightforward memory upgrade will find this module fits and works. Builders using a different motherboard, a laptop, or a workstation that requires registered or ECC memory should look at other parts.

The spec that decides fit

The module is a 288-pin DDR4 UDIMM rated at 2666MHz with CL19 latency and 1.2V operation; if your board needs a different pin count, voltage, speed grade or error-correction type this stick will not work.

Highlights

  • 16GB DDR4 boosts multitasking on HP Pavilion 590 models
  • 2666MHz CL19 speed matches factory spec for reliable operation
  • 2V low voltage reduces power draw and heat
  • 288-pin UDIMM fits desktop slots without adapters
  • Backward compatible with 2133MHz and 2400MHz systems

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 Pavilion 590-p0099nb
HP Pavilion 590-p0099nl
HP Pavilion 590-p0305ns
HP Pavilion 590-p0556ng
HP Pavilion 590-p0557ng

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will this 2666MHz DDR4 module run with my existing 2133MHz or 2400MHz sticks in the Pavilion 590?

Yes, the module is backward compatible with 2133MHz and 2400MHz speeds, so it will downclock to match your current memory.

How can I verify the 16GB CL19 UDIMM is recognised at the correct 2666MHz speed after installation?

Open Task Manager’s Performance tab or run CPU-Z; both will show 16GB running at 2666MHz with CL19 timings if the module is seated properly.

Does the 288-pin 1.2V UDIMM ship alone, or are tools or extra brackets included for the HP Pavilion 590?

Only the single 16GB DDR4 UDIMM is supplied; no screwdriver, anti-static strap or mounting hardware is included.

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