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

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.