how much does boost clock on factory cards effect performance

[etrin]

I was looking at some 3070 and 3080 cards and was suprised at the spread of boost clocks on the different cards. I know they are binning them but 3070 range from 1725 to 1905. The 3080 was even wider.
How much performace does this amount to?
I know oc memory was the way to go to boost game performance but does the gpu have much effect?