Good budget computer build

[Nahtangnouv]

Im building a new system and I need the computer parts, can you give me a list of parts that I should buy? My budget is 400$ I don't need a graphics card and I already have the chassis covered

 

[tiny voices]

What is your intended use?

Do you need an OS, monitor, keyboard, mouse?

 

[Nahtangnouv]

What is your intended use?

Do you need an OS, monitor, keyboard, mouse?

Nope I have the os, monitor, keyboard, and the mouse covered
I want to be able to game just a bit from time to time and watch videos in hd quality stuff like that