I had bought a Thinkpad T580 with an nVidia Geforce MX 150. Not a great card by any means. But it should have been enough to run Doom 2016 at about 30 fps.
But the firmware has been super butchered and this fucking thing throttles so aggressively that it even struggles with Quake 3. It’s because of some Windows-only thermal configuration that defaults to the most conservative values without OS support. The CPU side of things has since been fixed on Linux (which was throttling too much as well) and ironically that made the GPU side worse because CPU and GPU share a heatpipe.
And fucking nVidia is locked behind tons of proprietary garbage and it’s impossible to change anything.
Fortunately I was eventually able to afford a Steam Deck. It’s saved my bedridden disabled ass from insanity.