The HP 798155-B21 server node represents a high-efficiency compute solution designed specifically for the HP Apollo 2000 system, aiming to provide a compact, scalable, and powerful server environment suitable for a variety of demanding workloads and applications. This Configure-to-Order (CTO) server node allows for customization to meet specific performance needs, with options for processors from the Intel Xeon E5-2600 v3 or v4 series, providing a blend of power, efficiency, and reliability. The XL170r G9 is capable of supporting up to two processors, maximizing performance and efficiency in a 1U half-width slot, making it an ideal choice for data centers looking to optimize space without compromising on power. It supports advanced memory capabilities with options for DDR4 memory, enhancing workload performance and energy efficiency. This model integrates seamlessly into the Apollo 2000 chassis, which is designed for density-optimized solutions, providing a flexible and scalable platform for both enterprise and data center applications. The deployment flexibility makes it an excellent choice for diverse workloads, including virtualization, high performance computing (HPC), and data analytics.