This memory kit from HP is a great addition to any computer setup. With 4GB (1x4GB) of DDR3 SDRAM memory and a memory speed of DDR3-1066 (PC3-8500), this kit is perfect for those looking to upgrade their computer's performance. It boasts a bus speed of PC3-8500 (DDR3-1066) and features registered memory, ensuring stability and reliability. The kit is manufactured in China and is quad rank x8, making it a top-quality choice for anyone in need of a memory upgrade.