So I can put a block on copper and I'd make my computer cooler?
More copper is not bad, just as more water volume in your loop is not bad.
Understand that fans and fins are not added to blocks of copper because they are superior to just having more copper, rather they are added because it is much cheaper to add fans and fins instead of adding more and more copper.
But you can add more copper and makes things worse the same as you can add more water and make things worse in your loop. There's always a way to bungle it up.
You have to do things right if you want them to turn out right, which normally goes without saying but around here it has to be said.
