A Mini ITX case is a compact computer chassis designed to house Mini ITX motherboards, which are smaller than standard ATX boards. These cases are ideal for building small form factor (SFF) PCs, making them popular for home theater systems, gaming setups, and portable workstations. Their size allows for efficient use of space while still providing essential features like cooling options and expansion slots. Despite their small size, Mini ITX cases can accommodate various components, including graphics cards, power supplies, and storage drives. Many models come with pre-installed fans or support for additional cooling solutions, ensuring that the system remains efficient and quiet.