What Is a GPU? Do You Need a Graphics Card?
The graphics processing unit (GPU) is a chip designed to draw images and run many similar calculations at once. It draws every frame of a game, displays video on your screen and speeds up some creative software. Most computers already include a GPU on the processor chip, but you may need a separate graphics card for some tasks.
Integrated or dedicated?
| Type | Good for | Limits |
|---|---|---|
| Integrated (on the processor) | Office, web, video streaming, photos | Modern games at high settings are slow |
| Dedicated (separate card) | Gaming, 3D design, video editing, AI tasks | More expensive, more power and heat |
When you do not need one
If you read email, write documents, browse the web or watch films, integrated graphics is enough. Modern integrated graphics also handle casual games and older titles well. Spending money on a card you will rarely use is a waste.
When you should buy one
- You play modern 3D games at smooth frame rates.
- You render 3D scenes or use GPU-accelerated editing software.
- You run software that uses machine learning features on the graphics chip.
- You want to drive several large high-resolution monitors.
Choosing a graphics card
Look at the game or software you care about and check independent benchmark results for it. Compare cards at the same price rather than by model name alone. Make sure your power supply and case have room for the card, and check the card's power requirements in the manufacturer's specification.
Memory on the card (VRAM)
The GPU has its own memory, called VRAM. For 1080p gaming, 8 GB is common. For high-resolution textures and 4K, look for more. Do not judge a card only by its VRAM, because the chip itself matters just as much.
Laptops and graphics
Gaming laptops often have a dedicated GPU, but its power may be limited by the cooling. Check reviews that test the exact model rather than just the chip name.
Frequently asked questions
Can I use the GPU for things other than games?
Yes. Many video editors, design apps and browsers use the GPU to speed up tasks. Check your software's settings to turn on hardware acceleration.
Do graphics drivers matter?
Yes. Keep drivers up to date from the manufacturer's website, because new releases often improve speed and stability.
Next: how to choose a desktop PC.
Power, heat and space
A graphics card draws a lot of power and produces heat, so check the recommended power supply and the physical length of the card before buying. Many cases cannot fit the largest cards. Laptops with dedicated graphics also run hot, so keep vents clear and use a stable surface. If you are unsure, read reviews that measure temperatures and noise during long sessions.
Upgrading later
A graphics card is one of the easiest parts to upgrade in a desktop. Buy a power supply with enough headroom now, and you can change the card later without replacing the whole system. Check your motherboard slot type and your power connectors before you buy the new card.
Related reading
- How to Build a PC: A Step-by-Step Overview: An overview of building a desktop PC from parts: compatibility checks, the order of assembly, and the common mistakes that cause a machine not to start.
- How to Organize Files and Folders So You Can Find Them: A simple folder system for documents, photos and downloads, with naming rules that make files easy to find on Windows and Mac.
- How to Use a Calendar to Plan Your Week: A practical way to use a digital calendar for planning: time blocks, reminders, recurring events and a weekly review that keeps you on track.