Peripheral Enhancements Corporation is a worldwide computer memory manufacturer with a strong focus on service, quality, and support. In a commodity-based market sector such as computer memory, Peripheral must rise above and beyond its competitors and add value to its product beyond the basics such as competitive price and reasonable quality. Peripheral offers extremely high-quality branded memory products at competitive prices built on a foundation of service and support unmatched in its industry.This memory is designed for Compaq ProLiant 5500 6/500 models 1, 2; ProLiant 5500/5500R 6/400, 450; ProLiant 5500R 6/500 models 1, 2; ProLiant 6000 6/400, 450, 500 models 1 & 2s; ProLiant 6400R 6/500; ProLiant 6500/6500R 6/400, 450, 500; ProLiant 7000 6/400, 450, 500 models 1s & 2s.