When you connect a second monitor to your laptop, the GPU has to work harder to manage the resolution and refresh rate of the second monitor, which may not be identical to your laptop’s screen or the other monitor you have connected.
To ease the workload on your GPU, try to set up both monitors with the same resolution and refresh rate in Windows.
Right-click anywhere on your desktop and choose “Display settings.” Windows shows you each monitor in a panel; click the monitor you want to adjust settings for and then click “Adjust resolution.” Set the resolution to the same dimensions for all screens to ensure that your video card’s workload is lessened, which will let it run at a lower temperature.
