The microprocessors in laptops are soldered in with ball grid array. Which means you had to unsolder them with hot air, and you need special fluxes and masks to solder a new one on there, again using hot air. They have $10,000 machines to do it.
Yeah no kidding, yet when one is a certified electronic tech like I was it is no big deal to trade out surface mount components..
We're not talking normal surface mount, we're talking ball grid array. You need an X-ray just to do QC on it. And most folks don't have access to $50,.000 worth of equipment to fix their $800 laptop.
I remember the 8080 Microprocessor, well. Microprocessors were vintage early eighties and then came Microcomputers. Now RAM is internal on the chip with the general purpose digital computer, ROM is still external of the chip. The main frame in my avatar had a 2 microsecond clock count and water cooled core memory and used COBOL, circa early seventies. edit: Thanks for the flashback.
There is cache ram, on I series CPU's is three levels, L1-3 for advanced prediction. But main RAM is still external and on the motherboard. DDR4 is currently the most popular,
In 1994 I showed Honeywell Aerospace what was wrong with their Tower Computer and they forgot to plug the ribbon cable into the mother board. In 1993 I showed Aniston Army Depot what was wrong with their main frame, and the General wanted to hire me but I told him that I signed a not to compete paper. Their main frame forgot the handshake bit.
Did you fool around with the Zilog Z-80, which Intel so heavily "borrowed from" in the construct of the 8080?