What is RAM?

In plain English

RAM (short for "Random Access Memory") is your computer's short-term memory — the desk space it uses while it's actually working on something. Think of it like the top of a desk: the more desk space you have, the more papers, folders and open jobs you can spread out at once without having to keep putting things away and fetching them again.

When you open a web browser, your emails and a Word document all at the same time, they each sit on that "desk" so your Windows PC or Android phone can switch between them instantly. The important bit: RAM is temporary. When you turn the machine off, the desk is cleared. Anything you want to keep has to be saved to permanent storage (a hard drive or SSD) — which is more like the filing cabinet next to the desk.

Why it matters

RAM is one of the biggest reasons a computer feels fast or frustratingly slow. If you don't have enough, the machine runs out of desk space and starts shuffling things back and forth to storage — and that's when you see the spinning circle, programs freezing, or everything grinding to a crawl when you have a few tabs and apps open. For a home user that means a sluggish, annoying day-to-day; for a small business it means staff waiting on a slow PC instead of getting work done. Often a computer that feels "past it" just needs more memory rather than replacing — a much cheaper fix.

What to do

• Don't panic about the numbers. Most modern Windows PCs are comfortable with 8GB of RAM, and 16GB gives lots of breathing room if you keep many tabs and programs open at once.
• Try the free fixes first. Restarting the computer clears the "desk" and often perks things up. Closing browser tabs and programs you're not using frees memory too.
• Know the difference. Adding RAM helps with juggling lots of things at once; it won't add storage space for your photos and files — that's a separate thing (a hard drive or SSD).
• Ask before you buy a new machine. A slow computer can sometimes be transformed with a modest memory upgrade. It's worth having someone check whether that's the case before you spend on a replacement.

How 365 Techies can help

If your Windows PC feels slow and you're not sure whether it needs more memory or just a tidy-up, we're happy to take a friendly look and tell you honestly — no jargon, no pressure.

Related: SSD · Hard drive · CPU (processor) · Megabytes & gigabytes — or browse the full A–Z jargon buster.