The HP 647873-B21 memory module, also known as a Remanufactured Kit, is designed to offer reliable and cost-effective performance for HP servers. With a capacity of 4GB and employing 1Rx4 architecture, this module operates at a speed of 1600 MHz, utilizing PC3-12800R technology. It's engineered to provide a balance between performance and power efficiency, making it an ideal selection for environments where both attributes are in demand. The 'RemanKit' designation indicates that this product has been thoroughly tested and qualified by HP to ensure it meets their high standards, offering a sustainable option without sacrificing performance. Ideal for data centers and businesses looking to expand their server memory capacity while keeping an eye on budget and environmental impact.