Add FAQ about default laptop GPU usage.

Frequently-Asked-Questions.md

@@ -21,6 +21,7 @@
 - [How do I setup a custom icon for my executable?](#how-do-i-setup-a-custom-icon-for-my-executable)
 - [How I deal with UTF-16 strings?](#how-i-deal-with-utf-16-strings)
 - [Why does `DrawMeshInstanced` not draw anything?](#why-does-drawmeshinstanced-not-draw-anything)
+- [Why is raylib using integrated graphics when a dedicated GPU is available?](#Why-is-raylib-using-integrated-graphics-when-a-dedicated-GPU-is-available)
 
 ## Can I run raylib in my old PC?
 
@@ -420,3 +421,19 @@ void main()
 ```
 
 </details>
+
+## Why is raylib using integrated graphics when a dedicated GPU is available?
+
+The GPU used is set by the user through the GPU vendor’s control panel. If you think it’s crucial that a dedicated GPU is used in your program, you can add the following code anywhere in your code to force the use of dedicated AMD or NVIDIA GPUs.
+```c
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+__declspec(dllexport) unsigned long NvOptimusEnablement = 1;
+__declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
+
+#ifdef __cplusplus
+}
+#endif
+```