This HP P1N51AT compatible 4GB DDR4-2133MHz Single 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.

• 4 GB memory smoothly executes complex apps and games
• DDR4 SDRAM interface synchronizes electrical and clock signals for an efficient data transfer rate
• No matter how heavy and numerous the applications that you are using, 2133 MHz memory speed with Unbuffered signal and CL15 latency will run them smoothly