There is a discussion here where people compare their GPU on some pictures taken as reference, with their computer.
I have formatted the data in the following table:
https://www.dropbox.com/scl/fi/3ec3c9etev9o92crqidvv/DxO_PhotoLab_DeepPRIME_Processing_Times.xlsx?rlkey=7hekbkpiloxkhhuspe4xq22pv&dl=0
They are sorted according to the last column that is an index of the performance (best performance are lines in the top).
My personnal data are those in red text. I am now using a RTX 4060 external GPU and it is nice.
The interesting information for you is that Joadrian Kruza has tested an Intel Arc A770 GPU and it is pretty fast.
You can download the test images (links are given in cells C3, C4, C5) in order to test your current computer and see how do you compare to others.