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A thin laptop with no fan at all. How can it last hours longer than the older one that has a fan? In 2020, Apple swapped the Intel chip inside the Mac for one it made itself: the M1. Playing the same video, Apple says the new one lasts 18 hours, the old one 12. One test at full brightness: the new one ran 8 hours, the old one just over 5.
The saving doesn't come from one trick. It comes from three. Trick one: don't rush. A chip at work is like a person on the move. The faster you go, the harder it gets. And a little more speed costs a lot more effort.
Apple's chip can take on eight small tasks at once. Intel's chips back then took about half that. Take bigger steps, and you don't need to run so fast. Same work, less power. Trick two: split the big jobs from the small ones.
This chip has eight workers inside: four strongmen and four little ones. Small jobs like checking email or browsing the web go to the little ones. Apple says they use just a tenth of the power. The strongmen rest on the side, until real heavy lifting comes along.
Trick three is also what makes the computer small: move the whole family into one room. In the old computer, the chip that does the work and the memory that holds things sit in different spots on the board. Everything has to be carried back and forth. The M1 takes the parts for computing, for graphics and for AI and puts them on one single chip. Its memory sits right beside it, and they all share one storeroom.
Shorter trips and no more hauling: that saves power, and saves space. This chip packs 16 billion tiny switches. The smaller a switch, the less power each flip takes. Less power means less heat. With less heat, the fan can go, and the body can get thinner.
So what is ARM? It's a “language” that chips understand. Nearly every phone in the world uses it. Apple spent ten years making chips for phones, and phones hate wasting power. Then it brought that skill to the computer. But switching to ARM isn't magic. Researchers compared them: the language alone makes little difference in power. The real difference is in the design.
Next time your laptop goes all day unplugged, quiet and cool, you'll know why: the tiny switches inside learned to take it easy, split the work, and live together. What drives you craziest about your computer? Tell me in the comments.
Apple’s own chip saves power with three tricks: don’t rush, split big jobs from small ones, and move the whole family into one room. Less power means less heat — so the fan can go.
Both are MacBook Airs from 2020. They look much the same — what changed is the chip inside.
The “strongmen” and “little ones” are the chip’s cores — the parts that do the work. One kind is built for speed, the other for saving power.
Using a sign-up page for a seafood dinner: walls, paint, switches, a shared notebook and a street address, no code required.
Key cards, hotel cards and anti-theft tags are the same trick: a battery-free tag that shouts its number back when a reader pings it.
WebSocket for total beginners: from "ask every five seconds" to "the other side shouts the moment something happens."
The whole toolkit: repos, commits, branches, pull requests, green squares. Treat it as save files in a video game and most of the jargon makes sense.