How to choose a laptop: CPU, RAM, storage, screen and battery explained

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Laptop listings are walls of model numbers, and shops tend to steer you towards whatever has the biggest figures. The better approach is to start from what you will do with it, then check a handful of specs that actually matter for that use. Here is how to go about it.

Start with what you will use it for

Browsing, documents, video calls, streaming: almost any current laptop has enough power. Spend your money on the screen, keyboard, battery and build.
Students: light weight and long battery life matter more than raw power. Check whether your course needs specific software that only runs on one system.
Programming and office power users: more memory and a good keyboard and screen.
Photo and video editing: a strong processor, plenty of memory, a colour-accurate screen and possibly a dedicated graphics chip.
Gaming: a dedicated graphics card is essential, and the laptop will be heavier, louder and shorter on battery.

Processors in general terms

Intel, AMD, Apple and Qualcomm all make laptop chips, and each has a ladder of tiers, roughly entry, mid-range and high-end (for example, Core Ultra 5 / 7 / 9, Ryzen 5 / 7 / 9, and Apple's base, Pro and Max chips). For everyday use, the mid tier of a recent generation is the sweet spot. Two things matter more than the badge:

Generation: a mid-range chip from this year often beats a high-end one from several years ago. Check the release year.
Power class: thin-and-light chips are built for battery life; performance chips in thicker laptops are faster but draw more power and need louder fans.

Read reviews of the specific laptop, because the same chip performs differently depending on how well the laptop cools it.

Graphics

Most laptops use integrated graphics, built into the processor, which handle video, office work and light games well. A dedicated GPU is needed for serious gaming, 3D work and heavy video editing. If you do not need one, do not pay for one: it adds weight, heat and cost.

Memory (RAM)

8GB is the bare minimum and feels tight with many browser tabs open.
16GB is the sensible choice for most people now.
32GB or more for heavy creative work, large programming projects or virtual machines.

On many thin laptops, memory is soldered and cannot be upgraded later, so buy what you will need for the whole life of the machine.

Storage

Choose an SSD, never a spinning hard drive, as the main drive. 256GB fills quickly once updates, apps and photos arrive; 512GB is a comfortable starting point, 1TB if you keep large files locally. Cloud storage and an external drive can stretch a smaller one.

Screen

Size: 13–14 inches for carrying around, 15–16 inches if it mostly stays on a desk.
Resolution: at least full HD (1920 x 1080); higher is sharper on larger screens.
Brightness: around 300 nits or more for well-lit rooms; brighter if you work near windows or outdoors.
Panel type: IPS is the common baseline; OLED gives deep blacks and rich colour; higher refresh rates (90Hz and up) feel smoother.
Check whether it is glossy or matte if you work under bright lights.

Battery and weight

Manufacturers' battery figures are measured under gentle conditions, so read independent reviews for real-world numbers. For carrying all day, look for under about 1.5kg and reviews reporting a full working day of battery. Gaming laptops often weigh well over 2kg and last a few hours unplugged.

Ports

Count what you plug in: USB-A devices, an external monitor (HDMI or USB-C with display support), SD cards, headphones. USB-C charging is convenient because one charger can serve several devices. Fewer ports mean buying adapters.

Windows, macOS or ChromeOS

Windows: the widest choice of hardware and prices, and the most software, including most PC games.
macOS: MacBooks are known for battery life, build and screens; good for creative work and many developers. Check that any specialist software you need runs on it, and that you are happy with limited upgrade options.
ChromeOS: Chromebooks are simple, secure and often cheap, built around the browser and web apps. Great for school and light use; not for software that needs a full desktop system.

If you rely on a specific program, check it runs on the system before anything else.

Final checks

Try the keyboard and trackpad in a shop if you can.
Read reviews mentioning fan noise and heat.
Check the warranty and how long the maker supports the model with updates.

Ask about the laptop you are considering, or share what you wish you had known before your last purchase, in the comments.