Take the machine to a service counter and get an estimate on repair.
Armed with that number it might make sense to shop for a new machine.
My gaming PC that can run games at 1080p 60fps for most games hasnt been able to run even fortnite at 720p without getting clay buildings and eventually freezing my system, but i can still hear sound when it freezes. I cant seem to run or load any games without my computer freezing and i dont know how or what to do to be able to run things properly again...
i7 3770 @ 3.4ghz
320GB 7.2KRPM HDD