AddOn HP P1N52AA Compatible 8GB DDR4-2133MHz Unbuffered Dual Rank x8 1.2V 288-pin CL15 UDIMMThis HP P1N52AA compatible 8GB DDR4 2133MHz Dual Rank Unbuffered 1. 2V 288 pin CL15 UDIMM is 100% guaranteed to be compatible with your system and to work right the first time. Adding additional memory is the best way to increase the performance of your system. All our memory is built to strict JEDEC standards to meet or exceed the Tier 1 OEM's factory requirements. Our products are also guaranteed by federal law to not affect or void OEM warranties.