PC hardware encompasses the physical components that work together to form a functional computer system, ranging from core processing units and storage devices to peripherals and cooling solutions. Understanding these components is essential for building, upgrading, troubleshooting, and maintaining computers across consumer, gaming, and professional workstation applications. Whether selecting compatible parts for a custom build or diagnosing performance issues, knowing how motherboards, processors, memory, and other hardware interact enables informed decisions that balance performance, reliability, and cost. Modern PC hardware continues to evolve with faster interfaces (PCIe 5.0, DDR5), advanced cooling technologies, and increasingly modular designs that empower users to tailor systems to specific workloads.