The HP 728352-B21 ProLiant BL660c Gen9 CTO Blade is engineered for enterprise-level performance and efficiency. It is designed to host critical applications and is well-suited for virtualized environments. This blade server is a 'configure-to-order' (CTO) model that allows customization to specific requirements. It comes without a CPU or RAM, giving businesses the flexibility to install processors and memory that meet their particular needs. The visible features on this model include multiple hot-plug drive bays, which allow for easy storage scalability and maintenance. It also offers a variety of I/O expansion slots visible at the rear, which is ideal for high-speed networking and increased connectivity options. This blade server is designed for integration into the HP BladeSystem c-Class Enclosure, known for its enhanced power and cooling efficiency. Note that the server’s compact form factor, as shown in the image, is meant to save space in data centers while maximizing computing density.