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

OWC

OWC 8GB DDR4 2666MHz CL19 1.2V 288-Pin UDIMM for HP Pavilion 590/595

SKU CH-SF7V-YVBVC

8GB DDR4-2666 CL19 UDIMM validated for HP Pavilion 590 and 595 desktops

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank1Rx8
  • 8GB capacity adds multitasking headroom for everyday workloads
  • DDR4 2666MHz speed matches HP Pavilion 590 and 595 specifications
  • CL19 latency and 1.2V voltage meet JEDEC standard timings
  • 288-pin unbuffered UDIMM fits desktop DIMM slots directly
  • Backward compatible with 2133MHz and 2400MHz systems for flexible upgrades

OWC 8GB DDR4 2666MHz UDIMM for HP Pavilion

This OWC module adds 8GB of DDR4 memory at 2666MHz to compatible HP Pavilion desktops. It uses a standard 288-pin unbuffered non-ECC design with CL19 latency and 1.2V operation. The part is built for HP Pavilion 590-p0558ng and 595-p0040ns systems.

Check your Pavilion model

Confirm the exact model number matches 590-p0558ng or 595-p0040ns. Verify how many 288-pin DIMM slots are populated and the maximum memory the motherboard accepts. The module runs at 2666MHz but will downclock to 2133MHz or 2400MHz if the platform requires it.

Replaces slower or smaller DDR4 DIMMs in supported

Swapping a 4GB or lower-speed stick for this 8GB CL19 module increases capacity and bandwidth for multitasking. The upgrade is worthwhile when the system currently runs near memory limits during everyday workloads.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $43.99
Cheaper than about 79% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $5.50 per GB
Cheaper than about 70% of the 20,941 comparable items (median $8.19 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 nameOWC
Part number2U6D41R808 GB
Total capacity8 GB
Product type288-Pin DDR4 Non-ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsHP Pavilion 590-p0558ng
HP Pavilion 595-p0040ns

Other versions of this model

5 more in the same range

Questions about this item

Does the 8GB DDR4 2666MHz UDIMM come alone or with extra parts?

The module ships as a single 8GB stick. No cables, brackets or tools are included. Installation only needs a free 288-pin DDR4 slot on the motherboard.

Should I pick the 2666MHz CL19 version or a faster kit?

This stick runs at 2666MHz CL19 and is backward compatible with 2133MHz and 2400MHz systems. Choose it when your HP Pavilion 590 or 595 specifies 2666MHz memory.

What does the 2666MHz rating deliver inside an HP Pavilion 590?

The 2666MHz speed matches the platform's native memory bus, giving the rated bandwidth without down-clocking. CL19 latency and 1.2V operation keep power draw low.

More in Model-Specific Memory Upgrades

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