ATX Cases: ATX (Advanced Technology Extended) is a computer form factor specification developed by Intel in 1995 to improve on previous de-facto standards like the AT form factor. ATX Cases are designed to house ATX and Micro ATX motherboards. Most ATX cases are designed to fit all the different types, makes, and models of motherboards out there but it is always important to check the features and functional characteristics of the case to ensure it is the right one for you. OutletPC has a nice selection of ATX cases at cheap prices. If you need an ATX computer case, this is the right place to shop.