A discrete graphics card is weaker than an integrated one. How can this be?

Question

Video cards

There is a laptop (Dell Latitude E6540) built-in graphics card Intel(R) HD Graphics 4600 and discrete AMD Radeon HD 8790M 2 GB. Until today, it (the second one) did not even harness, even taking into account the fact that high performance was set for some applications (including games) in the Switchable Graphics Settings. Today I tried to force shut down Intel to get AMD to work. And what do you think happened? AMD turned out to be weaker than Intel (in task manager > performance, AMD is still loaded at 0%. A bug, or does it not work at all?). Of course, I understand everything, but why put a discrete card in the computer that is weaker than the built-in one? Most likely there is a problem somewhere. I haven't been able to find it yet, hope you can help.

Answer 1

The first problem that may be on the surface is the driver for a discrete video card.

Answer 2

https://www.videocardbenchmark.net/compare/Radeon-...

Answer 3

Couldn't it be that AMD is so cool that it doesn't take your load as meaningful and that's why it shows 0%?