Noooo man, dont tell me it ...Because my 3rd 7700K is L643...
My test for simply OC I did with Windows 10, temp in my room 22C.
HW setup: Maximus IX Apex, AIO cooler Silverstone TD02 SLim
CPU and BIOS setup: manual voltage, CPU clock 5 GHz, HT on, Cache 4500 MHz, RAM 3600MHz, LLC5, no delid yet
ES 7700K 1.287V CinebenchR15 5000 MHz 1.325 V, max Cinebench 5100 MHz 1.45V
retail 7700K L641G639 1.168V Cinebench R15 5000 MHz 1.265V
Cinebench 5100 MHz at 1.345V AIO