Is it possible to replace an integrated graphics card?

Integrated graphics are either chips soldered onto the motherboard, or are part of the cpu chip. You can’t replace them. If your motherboard has a pci or pci-s expansion slot, you can get a discrete graphics card and abandon use of the integrated graphics. But get a good enough discrete card or you may be disappointed.

How do I use my dedicated graphics card instead of integrated?

Changing graphics card settings to use your dedicated GPU on a Windows computer.Right click on your desktop and select Graphics Properties, or Intel Graphics Settings. In the next window, click on the 3D tab and set your 3D preference to Performance.

What is a dangerous GPU temp?

Graphics card temperatures typically range from 30°C to 40°C at idle and from 60°C to 85°C under load. Most high end video cards typically have a maximum temperature between 95°C-105°C, at which point the system will shut off to prevent damage.