Is it possible to connect each and every pin of two IC's together and increase perfomance?
You basically described a multi-core processor (which is common to find on ARM chips). You could split up your processes between the two chips (e.g., have one chip control half of your functionality, and the other the other half) then set up a way for them to communicate to each other to coordinate when they have to.
Better yet, buy a single chip that has two cores built into it. That makes coordinating actions between the two &quot;chips&quot; even faster - and you would effectively be putting all the pins together.
So yes, you can &quot;go faster&quot; by having two cores instead of one, but it would not go 2x faster since there will be some overhead needed to coordinate between the two chips.