What happens next?

How to build a personal desktop computer
Prepare the mainboard (motherboard).
If you want to assemble the well-liked device, you should use intel i3, i5, i7 mainboard.
Mount the cpu in the socket of the mainboard.

Choose your answer from:
(1). If the motherboard is necessary, you may mount it on the side of the mainboard. Determine if your pc will break in half (eject).;
(2). You must choose the correct cpu for your motherboard, and install it according to its instructions. Connect the cpu cooler to the mainboard.;
(3). You should do this with the cable slots facing outward. Add the adapter with cpu attach (within reason).;
(4). Order the components from the mount bar at the front of the motherboard. Ensure they're all in order properly, and then attach software to the motherboard.;
(2).