I want to bulid a desktop but I dun no what to do. I need to get some idea for motherboard video card, and how do I know what type the cpu suits for what type the montherboard ? Can someone give me some idea. Thank You

See if this page helps

Build a Custom PC - How to Build a Computer in Easy Steps

About half way down the page is getting started

Will try to help out if you can have more specific questions as Build a Desktop is sort of a broad subject with many factors that are gone over after clicking the Getting Started link

OK thanks