Server Hardware Architecture: CPUs, Memory, Storage, and I/O explores the foundational components and evolving technologies that drive modern server systems. From processor design and memory hierarchies to storage innovations, I/O subsystems, power management, and hardware-level security, the book provides a comprehensive analysis of how hardware architecture supports enterprise computing, virtualization, edge deployments, and data center scalability. It examines real-world trends, sustainability practices, and emerging innovations, offering essential insights for IT professionals, system architects, and anyone involved in server infrastructure planning or optimization.