Advice on upgrading PC... :D

[DogEatsDog]

I'm not too good with computer hardware, but I think if you're upgrading to a decent CPU/GPU you'll need a different motherboard too, and possibly more RAM. So I think you're best buying a new PC with a decent sum of cash.

Correct me if I'm wrong

I'd rather buy all parts seperate.

But also i don't want to upgrade all things, just the most needed.