Mini-ITX is a small motherboard form factor designed for compact computer systems. Measuring just 17 x 17 centimeters (6.7 x 6.7 inches), it allows for efficient use of space while still supporting essential components like a CPU, RAM, and storage drives. This makes it popular for building small desktop PCs, home theater systems, and gaming rigs. Despite its size, Mini-ITX motherboards can offer a range of features, including multiple expansion slots and connectivity options. They are compatible with standard ATX power supplies and can accommodate various cooling solutions, making them versatile for different computing needs.