Sajin
Cpu imc degration would be my guess.

Sajin
No problem. No way to really check unless you don’t mind using massive amounts of voltage (which could also cause more degration issues) to see if you can get it going again because the imc may need massive amounts of voltage to make it work properly now. 1.3v vsa/vccio is the most voltage you should use.

INTEL
Note 
Altering the frequency and/or voltage outside of Intel specifications may void the processor warranty. Examples: Overclocking and enabling Intel® XMP, which is a type of memory overclocking, and using it beyond the given specifications may void the processor warranty. If an overclocked processor was enrolled in the Performance Tuning Protection Plan (PTPP), the protection plan will cover processor replacement only, not memory replacement

Zeddivile
I agree with the previous responses.  I would just add that you should RMA the 9900ks.  I recently experienced the same issue of loosing a memory channel on the IMC of a 9900KS.
 
Intel asked me to take an image of the QR code on the CPU and within two days of receiving the CPU approved and sent me a check for more than the MSRP... Just as expected. Intel and AMD respect their warranty's and their customers....

RainStryke
I don't think the RAM voltage is linked to those unless there is something else going on with the XMP profile, i'm 99% sure it's not.
 
If it's something with the CPU, you must get it sorted quickly, cause that warranty only lasts 1 year on the 9900KS. That's another reason I sold it and went with the 10900K where I have the standard 3 year warranty.
 
XMP is very finicky. It's not promised and marketing on it at this point is misleading. I've had my fair share of working with high frequency RAM. My Gigabyte Z390 Master does great with my 4x8GB 4266MHz CL17 kit as long as it's paired with a i7 9700K, the i7 8086K I had would boot with it, but I would get a bunch of soft crashes in the OS.  The i9 9900KS was a little better, but still had some random crashes... Even my i9 10900K doesn't really work with that kit. So I decided to move down to a 4000MHz CL18 kit. Also, they don't always promise the full kit works, sometimes it can be just 1 DIMM or 2 DIMM's and not all 4 even though a kit of 4 can show up on the list. MSI does a good job of telling you what configuration works, my Z390 ACE also has strong memory support.
 
Do you have the latest BIOS for your motherboard?
Have you checked the Power Supply? Also, make sure you are not using modular cables from a previous power supply.

Nealx01
do you have any other kits of ddr4? the z390dark isnt exactly optimized for micron rev E which is what that ballistix max 4000kit is. i have it also, but i also have a small mountain of Bdie. that kit isnt on the QVL and its not exactly a secret that the dark does best with samsung Bdie memory ICs. so the fact that it does fine at jedec (stock) and then hangs or crashes at XMP sounds isnt out of the question.

its also possible the memory controller might just need more voltage. 
set Vccio and VCCSA to 1.300v each and see if the crashes still happen.

report back

Sajin
So it booted with two sticks without xmp, but were you able to use the computer at those settings very long before switching to xmp?

RainStryke
Okay... Did some research - I thought you were having an issue with the second channel on your board. Also, the 9100F has a lesser IMC, rated at 2400MHz.

Some memory types just don't work well with those boards, it also looks like EVGA does not really support Crucial XMP RAM at all when looking at the QVL list.
https://www.evga.com/support/motherboard/


I was curious if my boards QVL to see if it could support your RAM. They have 64 entries for Crucial, they support like 1000+ XMP configurations where EVGA has a basic list. Looks like most of their support is geared towards G.Skill then Corsair with a few Kingstons, but that's about it after the 4 Crucial kits they support. You could return the CPU for store credit and move to a G.Skill kit... this one is on the QVL list:
https://www.newegg.com/g-skill-32gb-288-pin-ddr4-sdram/p/N82E16820232575
 
This is the fastest kit they support on your board:
https://www.newegg.com/g-skill-16gb-288-pin-ddr4-sdram/p/N82E16820232759
 
There is a guy on these forums that had some really good luck with Patriot Viper RAM. ***PLEASE NOTE THIS IS LUCK OF THE DRAW*** Not everyone's Z390 Dark is going to work with this.
https://forums.evga.com/Patriot-viper-steel-ddr-4400-MHz-is-cheap-17000-ish-m2964431.aspx

I actually purchased it right away when I found out about it, thinking it would work with my Gigabyte Z390 Master. I couldn't get 1 stick to boot with XMP enabled, and that kit has a secondary profile that runs it at 4133MHz too. Didn't work out, so I had to pay.... too much to get the kit I wanted. Here's the Patriot RAM:
https://www.newegg.com/patriot-16gb-288-pin-ddr4-sdram/p/N82E16820225144
 
Who knows... if you feel like putting in the effort, someone at EVGA might be able to help you get it to work. But it might be a problem if your memory is Dual sided... Most of EVGA's support is geared towards Samsung single sided kits under the G.Skill name.