When we look for a new gaming PC already assembled, we see how all, absolutely all the models that we can buy only include a dedicated graphics card. You won't find any models that include two graphics cards, but that doesn't mean you can't connect more than one to the motherboard, provided it has PCIe slots to do so or using external graphics cards via a USB4 or OCuLink port.
If we connect multiple graphics cards to a PC, Windows will have no problem recognizing them on the computer, as it already does by displaying both the integrated graphics card on the card and the dedicated external graphics card. Another very different thing is that they can be used together to improve the performance of, for example, video games.
It is important to note that we are talking about home use, with maps and graphics that any user has at hand, and not hardware that can be found in data servers where multiple GPUs can be connected to work together, AI racks being the most common example.
If we have several graphics cards connected to a motherboard, when running the game or application that is going to be used, only the graphics card on which the monitor on which the image is displayed will work. The rest of the graphics cards will remain lookso if you want to improve the graphics performance of your PC in video games with higher FPS and resolution, what you need to do is change to a more powerful graphics card.
If high-end graphics cards from NVIDIA and AMD had very different performance in performing certain tasks, it might make sense to install them on a PC and use them interchangeably, however, both share virtually the same features. Since they can't work together, even if they're from the same manufacturer, there's no motivation to do so.
In the past you could
A few years ago, having two graphics and using them together was possible and common thanks to technology SLI from NVIDIA and Crossfire from AMD. This technology has made it possible to increase graphics performance. However, the performance obtained in return wasn't really worth the investment of purchasing two graphics cards, which is why NVIDIA and AMD stopped implementing them. Additionally, developers weren't about to implement this technology in their video games.
The performance of the graphics cards that can currently be found on the market is more than sufficient to run all types of games, even if not all of them allow you to benefit from the same graphics quality since it depends on their performance.
Game developers take into account the features offered by the graphics and adapt the titles they publish to them because, if this were not the case, it would not be possible to play. This same case applies not only to PC games, but also to games developed for consoles. If a game has such high requirements that it is not capable of running on the hardware currently available on the market, it will not have a commercial release.
