Hi my first post here.
I collected the results given by people on this thread for 7700K on a spreadsheet, batches, vcore, cache freq, ram freq :
https://docs.google.com/spreadsheets/d/1rpJaMBwV2MBX7_PQr2JTXAQmgfrRMuTK4R3Zod2JIuU/edit#gid=0
I haven't given the names of most of the owners due to some laziness (except for massman given the number of cpus he tested ).
I also used as other sources a topic on the french forum hardware.fr + some collected from reviews of 7700K.
Stability test is CB R15 usually, and if other tests have been used I quote them.
Feel free to give me corrections ! That took some work so there are probably som errors in the Table.
So there are 70+ cpu on the spreadsheet.
It is difficult to draw firm statistical conclusions because the L939 is overrepresented and for other batches there are two few cpus.
But overall, if one insists on drawing a conclusion L643 and L639 seem to be good batches.
best
pkv