This Axiom 4GB DDR3-1866 ECC UDIMM for HP is designed and manufactured using tier-one components and represents the very best in quality management, reliability, and advanced memory testing. Offering leading technologies that adhere to stringent manufacturing quality standards, Axiom delivers the highest level of consistency and product value for your success. Advanced testing processes ensure the products are 100-percent guaranteed compatible, and exceed all system-specific and industry standards. Upgrade with confidence, Axiom for a better solution.