RAM (Random Access Memory) is your computer's short-term working memory. It's the space where your PC keeps the programs and files you're actively using so they're instantly available — instead of re-reading them from the much slower storage drive every time.
The kitchen analogy
Think of your storage drive (SSD or hard drive) as the cupboard — it holds all your ingredients, but it takes time to go in and get things. RAM is the worktop — the small, fast surface where you keep whatever you're currently cooking. You can only have so many things on the worktop at once, and if it's full, the PC has to swap things between the worktop and the cupboard, which is why it slows down.
Two key properties
- Fast. RAM is far quicker to read and write than your storage drive, which is why it's used for active work.
- Temporary. Everything in RAM is cleared when you turn the PC off. That's why you lose unsaved work in a power cut.
Why more RAM helps
Open a browser with 20 tabs, a video call and a spreadsheet, and each one wants a place on the worktop. With too little RAM, Windows starts shoving things out to the slower drive (this is called paging or swapping), and the PC feels sluggish. More RAM means more things fit on the worktop at once, so fewer trips to the cupboard.
How much do you need?
- 8 GB — the bare minimum for light use in 2026.
- 16 GB — comfortable for most home use: web, documents, video, casual games.
- 32 GB or more — for video editing, 3D, heavy multitasking.
If your PC is slow with lots of tabs open, RAM is often the first thing worth upgrading — after making sure you're on an SSD.