so you mean all new stuff, no reuse old case ?
a tip when building PC have a good set of tools
when install CPU makes sure you know where the marks to align oritation
and take one edge of CPU and conect to socket edge with slight pressure of latural force along CPU and like a door hindge works close the door, if still have old computer, try practicing with remove and install old CPU to get the hang of it. Note: check your motherboard box for the BIOS version and check if it supports your new CPU if not the system will not boot, need to use a CPU that matches BIOS version to get system to boot , then get the correct bios version file on flash stick that MATCHES your MB REVISION note written on MB as Rev.x.xx matches MB model and Rev. once booted enter bios and update bios with correct file. note do not turn off system when updating bios or loose power will render a new door stop!
other the pins in socket are very delicate if bend one system will not boot. to fix that need a magifying glass and medium size safety pin to straighten it and careful not to slip and bend others, been there took me 4 attemps to get it booting. best look at the overall array of pins and match alignment position.
nice tool to use to install CPU. smear some vaseoline on cup squeeze bulb then attach to CPU heatspreader , pich up by clear plastic and wiggle to test if holding. place CPU in socket, with 2 hands , 1 hold down CPU other hand squeeze bulb to relase then still holding CPU down close the socket retainer and latch locking arm. then clean off vaseoline with lint free paper/cloth with rubbing alchol
these are the things sometime happens on new stuff
some stores offer hardware installing ask to save the headache installing CPU
oh the graphics going to be a card or built in CPU ?