@sun I'm currently on an M620, and just put it at 1.20GHz most of the time. Celeron is basically defective product but depending on the year if was made it should still be good, I mean I got a sff thinkcenter from 2018 with a celeron in it and it's faster than my M620 at it lowest frequency.
Obviously if this is on windows, it's defacto trash.

I'm currently working for someone on their acer es1-523 and it's cpu is a E1-7010 APU with a max frequency of 1,50GHz and it's unusable with windows, migrating it to lubuntu and then installing the MATE DE mate everything more usable.