For a graphics card always an external power supply?

Ve
- in Gaming
1

In this video

I have the possibility that you can connect an external video card to a laptop. With the adapter. My question is: do you still need an external power supply on this adapter, or only with graphics cards that consume more than 75 watts? For example, a GTX 750 TI consumes only 75 watts. Do I also need a power supply on the adapter?

En

Yes you need