What's Inside Your Console?
A Guide for Gamers
You use it every day to play games. But what's actually happening inside that box? Let's open it up and find out what makes your console tick - no tools required.
100,000,000,000 calculations per second
What's Inside Your Console?
That's what happens every time you press a button
The Computer That Plays Games
Your PlayStation, Xbox, or Switch might look like a simple box. But inside? It's a seriously powerful computer - more powerful than every computer on Earth... in 1980. Combined.
The cool thing is, your console has parts that work a lot like you do:
- -A brain that makes decisions
- -An artist that draws everything you see
- -A notepad for stuff it needs to remember right now
- -A bookshelf for all your games and saves
Let's meet each one.
The Four Main Parts
Every gaming console - PlayStation, Xbox, Nintendo Switch - has these four things inside. They all need to work together for you to play a game.
See if you can spot: Which part do you think works the hardest when you're playing a game with amazing graphics?
CPU - The Brain
Makes all the decisions. "Should this enemy attack?" "Did that jump land?" The CPU figures it out.
GPU - The Artist
Draws every single thing you see on screen. Every frame. Every explosion. 60 times per second.
RAM - The Notepad
Super fast memory for stuff happening right now. Where enemies are. What you're carrying. Gone when you turn it off.
Storage - The Bookshelf
Where your games live. Your save files. Your screenshots. Still there when you turn it back on.
Click each part to learn more about what it does.
The Brain (CPU)
CPU stands for "Central Processing Unit" - but you can just think of it as the brain.
Every single thing that happens in a game? The CPU decides. An enemy spots you and starts running toward you - the CPU calculated that. You press the jump button - the CPU figures out how high you go, whether you make it to the platform, whether you hit that coin.
CPUs are measured in "gigahertz" (GHz). That's how fast they can think. A PS5 runs at 3.5 GHz, which means it can do 3.5 billion simple calculations every second.
Think of it like this: if you could do one maths problem per second, it would take you 111 years to do what your console's CPU does in one second.
The Artist (GPU)
GPU stands for "Graphics Processing Unit" - the part that draws everything you see.
Here's the wild thing: your TV shows you a new picture (called a "frame") at least 60 times every second. That means the GPU has to draw an entirely new image of your game world - with all the lighting, shadows, reflections, and characters - in just 1/60th of a second.
Why doesn't the CPU do this? Because drawing is actually thousands of tiny calculations happening at once. "What colour should this pixel be?" multiplied by 8 million pixels. The GPU is specially designed to do millions of simple calculations at the same time - something the CPU can't do.
The CPU is like one really smart person. The GPU is like thousands of less clever people all working together. For drawing, thousands of workers wins.
Fast vs Slow Memory
Your console has two types of memory, and they're very different.
RAM is like a whiteboard. It's super fast - the CPU can grab information from it almost instantly. But it gets wiped clean every time you turn off your console. RAM holds everything happening right now: where enemies are standing, what's in your inventory, the exact state of the game world.
Storage (SSD or hard drive) is like a library. Much slower to access, but permanent. This is where your games are installed, where your save files live. A PS5 has 16 GB of RAM but 825 GB of storage - over 50 times more.
Why this matters
Loading screens exist because the console is copying stuff from slow storage into fast RAM. Faster storage = shorter loading screens. That's why new consoles with SSDs load so much faster than old ones.
What Happens When You Start a Game
Let's follow what actually happens when you launch a game:
- 1.Load: The game files copy from Storage into RAM. This is the loading screen.
- 2.Process: The CPU starts running the game code. It figures out where everything should be.
- 3.Render: The GPU takes that information and draws it - 60 times per second.
- 4.Repeat: Every time you press a button, the CPU processes it, updates the game state in RAM, and the GPU draws the new frame.
All of this happens in a fraction of a second. Press jump, and within 50 milliseconds (1/20th of a second), your character is in the air on screen.
Now You Know
Next time you turn on your console, you know what's happening inside.
The CPU is making billions of decisions. The GPU is painting millions of pixels. RAM is holding everything that matters right now. Storage is keeping your games safe until you need them.
Four parts, working together, doing the impossible - letting you explore worlds, battle enemies, and race cars that don't exist. All in a box that fits in your entertainment center.
Not bad for a gaming machine.
Going Deeper
Got the basics? Here's more cool stuff.
Why Does It Get Hot?
Ever noticed your console gets warm? That's not a bug - it's physics.
When electricity flows through the CPU and GPU doing calculations, some energy turns into heat. More calculations = more heat. That's why consoles have fans - they blow cool air over the hot parts to stop them from overheating.
The PS5's weird shape? That's mostly for cooling. All those curves and vents help air flow through to keep everything from getting too toasty.
How Far We've Come
The original PlayStation (1994) had 2 MB of RAM. The PS5 has 16,000 MB. That's 8,000 times more.
The original Xbox (2001) could do about 20 billion calculations per second. The Xbox Series X can do over 12 trillion. That's 600 times more powerful.
And it keeps getting better. The console you play today is more powerful than supercomputers that used to fill entire rooms. In another 10 years? Who knows what games will look like.
Keep Exploring
Questions to Think About
- - How is your phone different from a console? (Hint: it's got the same four parts...)
- - Why do some games take longer to load than others?
- - What happens if the GPU can't keep up? (Ever seen a game "lag"?)