I should specify then that my (old) 102x47 entry is with HT off on the 6700K.
I've since then however moved on to 100x48 with HT on and 1.44v max, but haven't stress tested it with anything besides games. Maybe one rainy day I'll do a proper, chartable entry with my new settings.
Page 115 https://www-ssl.intel.com/content/www/us/en/processors/core/desktop-6th-gen-core-family-datasheet-vol-1.html#
Specifies 1.5v as max operating voltage, 1.45 should still be well within bounds.
(Oddly enough it used to be 1.52v previously )
So the 1.45 listed by OP was just to stay safe and well below 1.52? The wording used in the OP seemed too cautionary if we are confident in Intel's 1.52 guideline. I for sure don't want to get close to what they say is the max though lol. It also looks like no one on the charts does either.