Is an old processor and a new graphics card a good idea?

Question

Computers

I want to install a new video card (games on the first computer flew) on another computer with an old processor (2004) will the games start?

Answer 1

No, the games will not work.
Everything will slow down - it will rest on the performance of the processor.

Answer 2

Well, if there is a connector on the motherboard, you can put it in, and the games will start, they just, most likely, will slow down, because not only the video card is important for games, but also the processor.