Question Hp Compaq dc5100 sff to gaming pc

[Vicxtrx]

I have an old HP Compaq dc5100 sff and isn't used at all. I recently thought of possibly turning it into a gaming pc. I was wondering if this was possible and if so what would I have to replace? I am new into building a pc so any advise would help.

 

[rgd1101]

if so what would I have to replace?

replace the whole thing