Instead of having a motherboard with the RAM, CPU, GPU on different components, you integrate them on a single die or chip. It is going to cost you a lot of mo

Instead of having a motherboard with the RAM, CPU, GPU on different components, you integrate them on a single die or chip. It is going to cost you a lot of money to do it right(you can use multiples dies inside a die but the real thing is just using one single die), but if you can sell enough(like Apple) you win on price per unit, reliability, mount cost, size volume and weight.