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

OWC

OWC 16GB DDR4 2666MHz CL19 1.2V 288-Pin UDIMM HP Pavilion 590 Series

SKU CH-8SGT-75ZCA

A 16 GB DDR4 2666 MHz CL19 UDIMM validated for HP Pavilion 590 series desktops

  • Capacity16GB
  • Type288-Pin DDR4 Non-ECC UDIMM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCNo
  • 16GB DDR4 2666MHz boosts multitasking speed
  • CL19 1.2V timing runs cool and stable
  • 288-pin UDIMM fits HP Pavilion 590 series
  • JEDEC and RoHS compliant for warranty-safe upgrade
  • Backward compatible with 2133MHz and 2400MHz systems

OWC 16GB DDR4 2666MHz UDIMM

This 16GB DDR4 module runs at 2666MHz with CL19 latency and 1.2V operation. It is built for HP Pavilion 590 series desktops including the 590-p0039, 590-p0054, 590-p0055na, 590-p0067cb and 590-p0090na models. The non-ECC unbuffered design suits standard consumer workloads.

288-pin unbuffered DIMM without heat spreader

The stick uses a standard 288-pin DDR4 UDIMM form factor and has no heat spreader, so it fits tight slots alongside other modules. JEDEC and RoHS compliance means the memory meets industry specifications for a warranty-safe upgrade. Backward compatibility with 2133MHz and 2400MHz systems allows it to downclock automatically if the platform requires a lower speed.

Verify your exact HP Pavilion 590 model number

Confirm the system is one of the listed 590-p0039, 590-p0054, 590-p0055na, 590-p0067cb or 590-p0090na units before ordering. Check how many DIMM slots are free and whether the board supports 2Rx8 dual-rank modules. Buyers needing ECC, registered memory or capacities beyond 16GB per slot should look elsewhere.

Highlights

  • 16GB DDR4 2666MHz boosts multitasking speed
  • CL19 1.2V timing runs cool and stable
  • 288-pin UDIMM fits HP Pavilion 590 series
  • JEDEC and RoHS compliant for warranty-safe upgrade
  • 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-p0039
HP Pavilion 590-p0054
HP Pavilion 590-p0055na
HP Pavilion 590-p0067cb
HP Pavilion 590-p0090na

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Questions about this item

Does the PC4-21300 rating on this DDR4 module affect the maximum transfer speed in my HP Pavilion 590?

The PC4-21300 rating indicates a 2666 MT/s data rate; the HP Pavilion 590 memory controller determines the final operating speed.

Will the 288-pin UDIMM form factor fit the DIMM slots on an HP Pavilion 590-p0054?

Yes, the 288-pin unbuffered DIMM matches the desktop memory slots used in the Pavilion 590 series.

What is the correct way to seat this 16 GB module and what step do people often miss?

Align the notch with the slot key, press down firmly until both side clips click, then verify the module is fully latched on both ends.

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