The form factor acts as a standard for defining the motherboard. Here is what you need to consider before you buy. The motherboard is arguably a PCs most important component, nothing else works without it and it decides what upgrades you can make in the future. There’s one important consideration we need to be aware of when choosing the case size and that is the size of the motherboard. They need to match. Form factor refers to the overall dimensions and component layout of a device—in other words, its physical size and packaging. The layout and shape of the main board is referred to as the form factor. The form factor for this specific motherboard, the K7VT4A PRO, is the ATX with 305mm x 178mm dimensions.. Just like other PC components, motherboards have standardized form factors, including ATX, MicroATX, and Mini-ITX. The form factor acts as a defining standard for motherboards and determines where specific components will fit, the power supply and the type of case. Form Factor. While there are dozens of form factors for desktop computers, most of them are either obsolete or developed for specialized purposes.. As a result, almost all consumer motherboards sold today belong to one of these form factors: Mini-ITX, MicroATX and ATX. It is important that your case and motherboard share a compatible form factor, so that the motherboard will fit into the case properly. The shape and layout of the motherboard is called its form factor. Nearly every motherboard for home computers at your local PC shop or online will be in one of these flavors. Motherboard Form Factors. It determines the power supply, the type of case and the place where individual components will fit. Image 113.5 – Small Form Factor Computer Case. The size of the motherboard is often called the Form Factor and there are several standards. In this article we’ll focus mainly on this feature, reviewing a list of the most common different form factors and their benefits, especially lower … Initially you’ll need to select a form factor. The motherboard controls external data flow via the IDE and USB ports and directs the data to the hard disk. Motherboard Form Factor. Why the Form Factor is Important September 18, 2014 Josh Covington Leave a comment If you’re currently in the market for a new gaming PC or workstation PC, you may be overwhelmed with the bevy of choices and options that are out there. Different Standards.