Follow below steps to check which graphics card is installed on the computer:
If only has an Intel graphics card, that means your laptop has an integrated graphics card.
If has a NVIDIA graphics card, that means your laptop has a discrete graphics card.
If has a NVIDIA graphics card and an Intel graphics card, that means your laptop has a discrete graphics card.
1. You can now use Device Manager to update device drivers, view the system resources a particular hardware device is using.
2. Start --> Run --> dxdiag
Click start and open the Run box, enter dxdiag into the Open field and then click OK. The DirectX Diagnostic Tool opens.
Click the Display tab. Find information about your video card listed under the Device section.
3. Install GPU-Z after downloading the GPU-Z installer from the TechPowerUp website. Launch the application and then click the Graphics Card tab. Find the model of your graphics card listed next to Name; the amount of video memory on your graphics card is listed next to memory Size.