I tried Upscayl before, but the upscaling process took too long, prompting me to give it up. I suspect it’s because my graphics card is outdated. 
Topaz and AVClabs are also too advanced for my computer, resulting in frequent crashes.
After trying the top AI image upscalers, I found that VideoProc Converter AI is suitable for me. It’s affordable, has lower system requirements, and supports batch upscaling. The upscaling results are also good; most of the time, I only upscale images to 4K or 8K.
