Sorry, let me try again, I realize I wasn't being clear with my first post.
I have an HP Pavilion a1430n, stock, with an added Nvidia 8800 GTS video card.
Here are the links to the specs and motherboard.
I would like to achieve better performance without buying a completely new set of hardware. If I upgraded the PSU, cooling system and ram, would I achieve any noticible increase? Would it just be a better idea to buy/build a new PC?
Also, is it possible to rip the guts out of this case and put it in a new one?
Thanks in advance