i would honestly not drop 300 on outdated parts that would barely run the minimum system requirements for pubg.. my honest opinion.. save your money up for a few months, fighting how you have been with gaming.. and just buy something that will actually support reccomended settings on pubg.. you should be able to do the build around $1000..

sidenote*

i have a computer with the exact same cpu.. the 8320, and with the stock cooler, i have overclocked it to 4.2ghz stable. what you really need the most to run pubg is the gfx card.. get the reccomended level at least which is a 6gb 1060 gtx..