Answer:
you will need a cpu(core processor unit), Motherboard,RAM(Random access memory), CPU Cooler, GPU(Graphics processor unit or Graphics card), PSU(Power supply unit or power supply), your gonna need storage so either ssd or hdd, and most important of all is a case and case fans, plus if you are going to have a whole setup your gonna need preipherals, so keyboard,mouse, headset, mic, mouse pad, desk, monitors,etc.
Hope this helps
