#2 is your best option to make things look a bit sharper.2. I have Nvidia 1650 ( I guess )
2 words: free trial4. I have seen Topaz AI. I do not use cracked software at all
There are different types of upscalers. Your TV/monitor has a hardware upscaler to show low resolution input fullscreen (when overscan is enabled). TVs usually have an interpolator as well to increase the fps and make things smoother. These are fast, but may have visible artifacts. Nvidia Super Resolution would also fall in this category I suppose.