Now the price of computer hardware is very exaggerated

I found the fps is not stable when I was playing to the csgo, at first maybe my drivers were not stable, but it isn't a solution to my question when I update the drivers. And the next step I reinstall my system, the same question. So I don't know why, maybe my hardware is too older.

I think bought used computer hardware to update that maybe to solution the question, but I found the very high price of used computer hardware, and near new. Unacceptable。