I believe Kingpin silica is all been binned so not the chip i believe. Good luck and I'm envious because I've been waiting 3 months now for a Kingpin.

 my port royal with +50 core  + 800 memory 100% votage 

ln2 bios have 1920 mhz core 

KP is a Card designed for LN2 Cooling....at the very least a Custom Open WC Loop.....anything less will be restricted to cooling and unfortunately that "Hybrid Cooler" wont get you perhaps what you were hoping for.
This always comes up with every generation of KP Cards.
 
Unfortunately the marketing is perfect.....whereby those that have a KP Card figure that "at stock" its going to be incredible, compared to any other Card.
Even a Vanilla Card under full water cooling can out perform a KP Card under stock cooling (with a little silicon lottery luck) ;)

This is a common misconception though.  I've seen the voltage/frequency curve for the KP bios.  It appeared to be 45-60 mhz higher than the base curve that reference type cards have (like my Zotac 3090).  The advertised 1920mhz boost clock is a combination of the increased VF curve and the increased power limit.  Most of it coming from the increased power limit.
 
So yes, the amount you can add to the core offset may be lower due to this, but not nearly as much as you would think based on the advertised 1920mhz boost (i.e. reference 1695 mhz vs KP 1920 mhz).
 
That said, a maximum core offset of +50 is probably "lowish", but not terrible.  I've found if I want 100% stability with my Zotac 3090, I can't run much more than +120 and it's in a custom loop with core temps in the 45-50C range depending on the level of power I'm running and ambient temp.