4K, also known as 2160p and UHD, is a popular display resolution. Resolution explains how many pixels a display has in width x height format. The more pixels a screen has, the sharper its image should look. The Digital Cinema Initiatives (DCI), a group of motion picture studios that creates standards for digital cinema, defines 4K resolution as 4096 x 2160, but this resolution is rare in consumer products. You'll usually see PC monitors, laptops and TVs labeled as 4K have a 3840 x 2160 resolution. However, this resolution is officially considered Ultra HD (UHD). You'll often see displays labeled as 4K/UHD.
Most modern GPUs support 4K/UHD output, though you'll need a reasonably powerful graphics card to play games at this resolution. For this reason, many gamers prefer running games at 1080p resolution (1920 x 1080).
There are numerous high-end laptops with 4K screens available. There are also a lot of 4K monitors on the market today, and they can be relatively affordable. However, if you want a 4K gaming monitor with a high refresh rate (120Hz or greater), you'll have to pay a premium.
Common PC Display Resolutions
| 5K | 5120 x 2880 |
| 4K | 3840 x 2160 (typical monitor resolution); 4096 x 2160 (official cinema resolution) |
| Ultra HD (UHD) | 3840 x 2160 |
| QHD aka WQHD aka 1440p | 2560 x 1440 |
| 2K | 2560 x 1440 (typical monitor resolution); 2048 x 1080 (official cinema resolution) |
| WUXGA | 1920 x 1200 |
| Full HD aka FHD aka 1080p | 1920 x 1080 |
| HD aka 720p | 1280 x 720 |
This article is part of the Tom's Hardware Glossary.
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