They said if you go above 6000 that you can't do one to one so how in the hell is 6000 The Sweet spot? If anything that's really the maximum allowed and would make me worry that there might be cases where that could even be an issue. It just seems like if 6000 is really the maximum that 5600 would be more of The Sweet spot technically.
With sweetspot they mean the best possible settings. Just like a 2700X the sweetspot seems to be 3433Mhz or so; even tho you can go beyond or up to 3700Mhz, above the sweetspot so far does'nt yield you the any much more really.