I have been working on overclocking my EVGA RTX 2080ti FTW3 Ultra Hydro Copper recently and have a few questions. I can manually set the GPU core to +140mhz with the power limit and voltage at max and the card will run at 2100mhz. If I attempt to go above +140mhz on the GPU core the GPU becomes unstable. Now this is where things get interesting... I have found that if I lower the GPU core to say +120mhz, but than I manually adjust the VF Curve the GPU will step up to what I am assuming is its max voltage 1.9v and will than boost to 2130mhz to 2160mhz. Seems to be semi stable at this point needs some adjusting... 
 
My question is what exactly is the VF Curve doing? I am guessing this just tells the GPU, to increase core clock, but do it at this voltage? Anyone have any idea what the max voltage is that these cards can hit? 
 
Thanks! 

Cool GTX
your overriding the voltage - pushing it higher at a given frequency = stability

Your removing the Linear Relationship
 
For benchmark runs it may have a positive result - you need to test it
 
For daily / gaming - "two steps" Up on GPU MHz probably does not even register
 
 
this may help explain it better than I can:  GeForce GTX 1080 Overclocking Guide
 
Nvidia Boost 4.0 (name change since the 20 series)
 
You set the stage to Allow the GPU to reach its Max performance. 

---> Unlike 900 series & earlier GPU where the User could Push the GPU up the hill.
 
+140 & stable on a Factory OC GPU is a very Good number
 

Interesting. The +140 is not too bad, but it seems that a number of people are hitting 2100mhz and cant get past that point. I am thinking that with more tweaking on that VF Curve that I can push it more, if I can get more voltage. Any idea what the max hard coded voltage is for these cards? I am thinking that it is 1.9v as I was not able to get the GPU to step up any higher than that. 
 
Thanks! 

The steps in the VF curve are the values used by turbo boost to control power draw. If you hit max power draw, turbo boost will step down to the next step to reduce power draw. This is my day to day VF curve I use and limited to stock voltage (0% or 1.068v) in afterburner. 
 
Hope this helps a little with a visual...
 
Chris