When it comes to gaming at 4K resolution, it requires significantly more processing power than just watching movies or browsing the web. 4K resolution means four times as many pixels on the screen than a standard 1080p display, which translates into a greater demand on the graphics card and processor.
To play games at 4K resolution, you need a powerful graphics card that can handle the increased workload. Even with mid-tier graphics cards, you can achieve reasonable frame rates in some older AAA games. Still, for the best experience, the most powerful graphics cards are required. High-end GPUs, such as the NVIDIA GeForce RTX 3090 or the AMD Radeon RX 6900 XT, are designed specifically for 4K gaming and can deliver smooth frame rates even on the most demanding games.
However, it's about more than just having a powerful graphics card. It would be best to have a high-end CPU, plenty of RAM, and a fast storage drive to ensure the system can handle the increased workload of 4K gaming. A high-end monitor that can display 4K resolution and supports a high refresh rate is also recommended to fully experience the increased detail and smoothness of 4K gaming.
Overall, gaming at 4K resolution is a demanding task that requires a high-end PC with powerful components. If you're serious about 4K, investing in the best hardware available is important to get the best possible experience.