Choosing the right graphics card: the simple guide
Office work, gaming or video editing: what graphics card do you really need? Power supply, case size, VRAM: here are the points to check before you buy.
Before you begin
Choosing a graphics card takes a bit of method. A good card in a poor PC is useless. Take ten to twenty minutes to check your hardware.
- Level: intermediate. No technical skills are required to choose, but you need to know how to read your PC's specifications.
- Time: about 20 minutes for the checks.
- Useful: a meter or ruler, the spec sheet of your power supply and case, and your motherboard's model number.
Important precautions
- Before opening the PC, turn it off and unplug the power cable from the mains outlet.
- Touch a metal part of the case to discharge static electricity. Avoid clothing that builds up static.
- Back up your important data before any hardware change.
- Don't touch the gold contacts or the chips on the card.
Steps to choose well
- Define your use. This is the most important criterion (see below).
- Check your PC's power supply. Note its wattage, written on the label. Compare it with the power recommended by the card's manufacturer.
- Check the power connectors. Powerful cards require one or more additional cables from the power supply. Entry-level models sometimes don't. Make sure your power supply has the right connectors.
- Measure the space in the case. Note the available length, and also the thickness: some cards take up two or three slots.
- Check compatibility. Your motherboard must have a PCI Express slot for a graphics card. This is the case for the vast majority of desktop PCs.
- Choose the amount of VRAM according to your use.
- Check the video outputs. They must match your screen (HDMI, DisplayPort).
Depending on your use
| Usage | What to know |
|---|---|
| Office work, internet, video | Usually no dedicated card. The integrated processor is often enough. A small card mainly serves to connect several screens. |
| Games | A dedicated card suited to your screen's resolution and the smoothness you want. The larger and more detailed the screen, the more powerful the card must be. |
| Video editing, 3D, graphic design | A dedicated card with a lot of VRAM and a processor powerful enough to match it. |
For gaming, aim for a card that matches your screen. There's no need to pay for a very powerful card if you play on a basic screen.
What is VRAM?
VRAM is the graphics card's own memory. It stores images and textures. If it's too low, games stutter and editing software slows down.
- For office work, VRAM doesn't matter.
- For recent games, the higher the resolution, the more VRAM you need.
- For editing and 3D, favor a generous amount, especially with high-definition videos.
Warning: the amount of VRAM isn't everything. A card with a lot of VRAM but low performance will still be slow.
Power supply and case: the sensitive points
A graphics card consumes a lot of power. If your power supply is too weak or old, the PC may shut down mid-game. In that case, replace the power supply with a suitable model. Don't try to force a connection with dubious adapters.
If the case is too small, change the case or choose a more compact card. Also think about ventilation: a powerful card runs hot.
Mistakes to avoid
- Buying without checking the card's length.
- Forgetting that the card requires specific power cables.
- Choose based on the amount of VRAM alone.
- Keeping an old, unknown-quality power supply.
- Pairing a very powerful card with a very old processor: the processor slows down the whole system.
- Forgetting to check that the screen has the right video input.
Frequently asked questions
Do I need a graphics card for office work?
No, in most cases. The integrated graphics processor is enough for office work, internet and videos. A dedicated card becomes useful for gaming, editing or multiple screens.
How can I tell if my power supply is powerful enough?
Read the power rating in watts on the power supply label. Compare it with the recommended power on the card's specification sheet. Also check the connectors. If the power supply is insufficient, it must be replaced.
Is a graphics card with more VRAM always better?
No. VRAM mainly helps with high resolutions and large projects. The card's power matters just as much. Compare both criteria before choosing.
