Yes, you can use two graphics cards at the same time. This is called Crossfire or SLI (Scalable Link Interface). This allows two or more graphics cards to work together in order to increase performance or quality of the visuals. The two cards must be from the same manufacturer and have the same model number for this to work.
Crossfire and SLI are normally used by gamers and video editors who need more power than what one graphics card can provide. This setup is also recommended for users who want to run 4K resolutions or multiple monitors.
To use Crossfire or SLI, you need a motherboard and processor that supports it. Not all motherboards support multiple graphics cards, and not all processors can handle the increased workload that comes with having two GPUs. Additionally, some motherboards will only support one type of crossfire or SLI setup, which can limit your options.
Once you have ensured that your motherboard and processor can support a multi-GPU setup, you will need to choose cards that are compatible. This means that both cards must be either AMD or Nvidia and have the same model number for Crossfire/SLI to work correctly.
Once your cards and motherboard are ready, you will need to install the appropriate drivers for your setup, as well as any additional utilities that the manufacturer may provide. Once the drivers are installed, you should configure SLI/Crossfire in your computer’s BIOS. Lastly, you will need to enable the multi-GPU feature in your game or 3D application, if applicable.
When using Crossfire or SLI, you will likely notice a boost in performance, depending upon the cards that are being used. If you are gaming, you should see an increase in frames per second, and if you are editing videos or graphics, your render times should decrease.
Overall, you can use two graphics cards at the same time with the help of Crossfire or SLI. However, it is important to ensure that your hardware is compatible and to choose cards from the same manufacturer. Additionally, you must install and configure the appropriate drivers and configure SLI/Crossfire in your computer’s BIOS. After doing this, you should see an increase in performance, depending upon the quality of the cards and the applications you are running.