On a build, you will need more than a processor. Essentially saying that you will need to pair motherboard and ram into the build. That being said, what board do you currently have? Speaking of which, what is the specs tot he system you currently own?
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
The 7th gen processor will need a 200 series chipset board while the 8th gen processor will need a 300 series chipset board.