Welcome to the Forum OverlordG
Did you remove the old drivers and run DDU to clean up?
Did you remove PXOC and delete the Folders and Make sure the Profile Folders is DELETED.
Did you update your MB Bios?
Did you reset your Motherboard back to the Default or Optimized Settings?
You will need to start from scratch to Overclock your CPU and Memory.
Also what you could OC your GTX 1070 Graphics Card will not apply to a GTX 1080 Ti Graphics Card.
Start with +20 +30 +40 +50 and so on, for not do not OC the Graphics Memory.
Set your Fan at 70% or Better 90%
 

@Bcavnaugh Thank you for the welcome
I read several posts about whether or not to remove nvidia drivers when transitioning from an Nvidia to an Nvidia and it was pretty much 50/50 on removing drivers and not doing it so I opted to just update the driver once the new card was installed ( so no I didn't )
 
Prior to having this EVGA card I had a Gigabyte and it's software, I removed it before I began trying to OC at all, so that would be a no also
 
My MB bios is as far up to date as I know of, I have a Asus Z170-A with a 7700k.
 
I didn't reset my motherboard
 
I guess I have some work to do before I try to push this thing far
 
 
@ Sajin
 
It was running at 1936 mhz for most of the +0 testing

@Sajin
I'm using an EVGA 750w P2 thats a little over a year old, with a single pcie cable.
 
I didn't cheap out on a psu so I hope it's not breaking down early. 
 
I'm not sure if my PSU came with a stand-alone 6 pin cable, I'll give it a look and see if I can find one to use with my 8 pin.

1. I would use 2(two) separate pci-e power cables to power the 1080. I personally use 3(three) to power both of my cards, one for the 1070 and two for the 1080ti. Your power supply came with 2x 6+2-pin connectors(8-pin).

2. If your CPU and/or memory overclock are unstable, games will crash.
3. I would use DDU again, install the latest drivers and start again from scratch.
4. When overclocking the GPU, max out the power limit and temp targets first, then core. Make sure the core is stable before moving on to the memory. Both of my cards do +50 core and +500 memory, which translates to 2038/9000 for the 1070 and 2038/12000 for the 1080ti.

http://cdn.overclock.net/.cd/cd9c4a9b_Capture1.PNG

http://cdn.overclock.net/.80/8065d163_Capture2.PNG
 
Good luck.
 
 

Ran Firestrike at +10 and +20 both passed
tried Time spy at +20 and it crashed, going to run Time spy again and if it fails I'm going to increase voltage by 10%
it should also be noted that during the +20 run in Firestrike the power % went up to the max of 120 several times.
 
-- edit -- 
ran Time Spy again at +20 with 10% increased voltage and it passed.

+40 has consistently failed, I don't feel comfortable going into the red voltage, so I'm dropping back to +30
 

@demon09 In between 1911-1999 it bounces around a lot.

I set mine to 117% , 90c and the volt slider all the way up.
There is a max setting the bios will not go over, it is the max safe voltage they will let you use.
I am pretty sure they are not going to let you overvolt a card and kill it, a card that they will have to replace under warranty...
 
Also I use a fan curve I set up.
Fan at 0 to 40c then a line to 75% at 70c then a line to 100% at 90c.
Depending on game I am playing, BOINC project or folding work unit 100% load stays around 60c max at 1911-2015
Even though the voltage slider is all the way up, the voltage most of the time is lower than the max it could be.
 

OverlordG
@demon09 In between 1911-1999 it bounces around a lot.

Just for comparison,
My FTW3, using 117% Power Target and Voltage Bar all the way up, usually hits 2000Mhz / 1987Mhz, this, without adding core clock or memory clock.

AdamInk
Sadly silicon lottery has a very big part in this, and of course the temps. When you reach higher temps the clock will dropp down at certain temperatures.

AdamInk couldn't said it better. Silicon plays a very big roll on this.
Some people might get higher overclock room, while other can't overclock at all. As Demon09 said it too, GPU Boost will make most of the overclock it can, safely, on your card, giving you even less room for playing with core/memory clock.

Two ways to have more clock are:
1 - Hybrid Cooler / Custom Water Loop (Since temperature pays big role on Pascal O.C. hability);
2 - LN2 ;

If you are just using the voltage offset slider, it doesn't work very well for figuring out your max OC. Best way is to use a custom voltage-frequency curve. My opinion is that MSI Afterburner is a better tool compared to PXOC for setting the voltage-frequency curve, and since you have an SC Black there isn't really any benefit to using PXOC. 
 
Most 1080ti users have the best luck slightly undervolting the card to find the best trade off of higher core clock speed and lower temps. Since GPU Boost 3.0 steps the clock speeds down as the temperatures increase, you will generally always see higher clock speeds by keeping your temperatures in check. You will get more consistent performance when your clocks stay at the same speed instead of bouncing around, even if the max clock speed has to be set slightly lower.
 
If you don't want to do the custom voltage-frequency curve, I recommend you set the power and temp limits to max (120% and 90 deg C) and just let the card run to the highest clocks it wants. GPU Boost 3.0 works pretty well, so if you don't want to spend a lot of time fiddling with the OC just set it and forget it and go game.

Dud? You did say you got it to 2000 MHz, right?

Typical 1080 TI overclocks range from 1950 to 2050 MHz on the core - right in the middle of the pack. There are a few outliers that are lower or higher, yet the majority fall in that 1950 to 2050 range.

Keep in mind that there is not a ton of real world performance difference between 2000 MHz core clock and 2100 MHz core clock. Honestly even at like 1900 MHz these cards are pretty beastly.

Most of EVGA 1080 or 1080 Ti cards are already overclocked from the factory and on the 10x series there doesn't seem to be much left on the bone so to speak, I had a 1080 that I stepped up to a 1080 Ti and neither card could I get to even OC 25 Mhz on the core, but If you consider most of their cards are already going an extra 100 or so its not all that bad to be honest, I am pretty happy with the out of the box over clock speeds...  I myself am more into stability than overall speed.  I DO fully understand the desire though as I have been in this industry a LONG time and it was a MUCH bigger deal when you had a Pentium 75 MHz and you would over clock it to 120 MHz (which all I ran into but 1 would do just fine and I am talking 100's of them).  At that point in the industry it was a MUCH bigger deal to me, now a days it seems like everything is so amazingly fast on most things it doesn't seem like it is even worth it?  Maybe I have just VERY unlucky in the Silicone lottery as people are saying here...  The 970 and 980 Maxwell chips on the other hand seemed like they would almost all overclock 10-15% without much trouble.  Again I am guessing the 10x series are just out of the box already pushed closer to tolerance...
 
Scott
 

Water cool it either Hybrid or custom and get a custom voltage/frequency curve happening using AB you might get  another bin or two out of it.   Not sure if that model has the Asynchronous fans or not but if not try AB with a V/F curve before going down the watercooling route 

dual109

Ranmacanada
Your card is FINE.  There is nothing wrong with it.  It is boosting way past spec already.  Getting really sick and tired of people posting and complaining about your cards not going even more past spec.  Your card has a 1566 stock clock and a 1670 boost clock, and you are at almost 2000!! and you're complaining you can't get even more?  What is wrong with you.  Seriously.   If you're not happy with the card, return it and someone who will appreciate it more will gladly buy it instead.  These types of posts need to stop already.  Anything you get beyond your boost clock is a gift.  You aren't guaranteed anything else.
 
TIL a card that is almost 230MHZ over spec is a dud.

Yeah on the link below for the card is says "Play longer overclock better"  prob should say "Play longer, boost higher"  Wouldn't consider a 30Mhz OC great.
 
https://www.evga.com/products/product.aspx?pn=11G-P4-6393-KR
 
 

It has a factory boost clock of 1670, and it's already overclocking itself to almost 2000, that's a 230 Mhz overclock right there, champ.  So please, tell me, what exactly is wrong with that phrasing?  I don't think you're understanding what the boost clock is.  This would be like someone getting a new cpu that self overclocks (boosts) to 5 gig and then complains that they can't push it to 5.2 when the processor itself only has a stock clock of 4.2.  A 30Mhz overclock on an already overclocked chip that is not even a 2% increase in performance from it's overclocked position is within the margin of error.  To complain about it when you already have an almost 20% overclock from your base clock, is ignorant.  If OP wants to overclock even more, get better cooling as others have stated.  As the card is, it's performing perfectly fine and is overclocking great as 2000Mhz is pretty darn good for a non water cooled 1080Ti.  Heck most 1080Ti FTW3's weren't even stable on air.  Just spend some time and read the forums.  2 grand is fantastic.  Anything higher generally needs water.