Ok I read the data sheet but 1.4v seems like a huge jump from 1.21, I dont get it. Not only that you dont need that much voltage to overclock to 4ghz anyway temps on air and low end water cooling would go way to high. Mindlogic zero was already hitting 80c in linx.
I can think of a few reasons, but of course only Intel knows for sure.
They may have done it to keep the i5/i7 (8's) from stealing any of the i7 9's glory, or maybe they really didn't know what to set it at because of the changes in the chip and were just playing it safe to see what the chip could actually handle out in the wild. Don't know.
Yep, completely agree that you don't need anywhere near 1.4v vtt for 4.0 Ghz but it's nice to know if you have to go over 1.21v you can.