[quote=@DarkwolfX37]
<Snipped quote by Meta>

I'm trying to upgrade but if I build from scratch and the harddrives are compatible then fuck it. I just want a better computer so I can play new games. 
And with MC I've allocated all 8 and still had problems.
[/quote]

Allocate 6 and get a better GPU. Make sure you're using your best GPU for Minecraft, and ensure your computer is running at high performance. then get a better computer