The size of your motherboard dictates the type of PC case you'll need. Micro ATX (mATX) cases are compact and ideal for budget builds or small spaces. ATX cases are the most popular size, offering enough room for most standard ATX motherboards and good airflow for cooling. EATX cases are the largest, accommodating high-end motherboards with multiple graphics cards and plenty of RAM. They provide the most space for expansion but are pricier and require more desk real estate.W
