This HP B4U36AT compatible 4GB DDR3-1600MHz 1.5V DIMM 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. 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 the Magnuson-Moss Warranty Act to not affect or void OEM warranties.

• 4 GB memory allows you to have more programs open at a time
• DDR3 SDRAM interface multiplexes 2-bit data from memory cell and I/O buses to minimize processor idle time and enhance your computer's performance
• Up to 1600 MHz speed with Unbuffered signal for smooth computer performance