New Updates for Z390 Motherboards today:
 
BIOS 1.07 (E399 Dark) / 1.08 (E397 FTW)

• Update OC support for future CPU
• Add 32GB memory module to support list

 

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Windows Installation

• Download the correct .zip file below for your motherboard:        

         131-CS-E399-KR - EVGA Z390 Dark - v1.07
         123-CS-E397-KR - EVGA Z390 FTW - v1.08

• First go into your BIOS and load defaults, save and exit
• Close all open programs.
• Go into the folder where you unzipped this package and double-click update.bat
• Press Y to start the flash process
• DO NOT TURN OFF POWER OR RESET DURING THE FLASH PROCESS
• After the flashing is finished, the system will automatically shut down. Then power on again and go into BIOS to setup.
• NOTE: If flash box immediately closes after flash attempt, the flash may need to be ran from a CMD prompt with administrator privileges or DOS version.

  
BIOS Installation

• Extract the contents of .zip file to USB flash drive (must be formatted as FAT32)
• Reboot the machine and go into the system BIOS
• From the BIOS, navigate to the Save & Exit tab and open "Select BIOS File."
• Select the .bin file you wish to flash.

 
Please let me know if anyone runs into problems with this update.  Thanks!

Thanks, will have a go with it soon.

So at first this was a bust for me as it would not load XMP profile 1 like 1.07 would (even though the values were wrong). Then I discovered through trial & error I could load any bus speed that ended in an odd number. So like 5033, 6073 oe\r 2933. Anything above 2400 that was even numbered like 2600 or 3000 I would have no screen display after exiting the bios. This is odd behavior but much close to XMP1 at 2933 15 -17-17-35.

 
Looking good on my end so far.
 
Add 32GB memory module to support list
Does this mean the Dark now supports 64 GB ram (2x32) ?

MhzManiac
So at first this was a bust for me as it would not load XMP profile 1 like 1.07 would (even though the values were wrong). Then I discovered through trial & error I could load any bus speed that ended in an odd number. So like 5033, 6073 oe\r 2933. Anything above 2400 that was even numbered like 2600 or 3000 I would have no screen display after exiting the bios. This is odd behavior but much close to XMP1 at 2933 15 -17-17-35.

Checked with the MB team.  The i7-8700 CPU does not support a 100 base memory ratio, such as 2600 or 3000.  Try using a 133 base ratio instead, as you've found success.

Thanks Lee, maybe I can try going higher with that info.
Success at 3067!

I dont want to speak too soon, I've been checking periodically since May when I completed this build for a newer BIOS that might allow me to unlock the potential of my memory that was branded as 3600mhz but would crash the system if I tweaked it beyond the default 2133mhz. I just noticed the new BIOS tonight and installed, and let the XMP profile take over and so far...success! Lets hope it stays. I've been enjoying my system and didn't want to have to deal with the downtime associated with RMAing memory I thought might be faulty. Hopefully now I wont have to. 
 
e: spoke too soon. It lasts a little longer than before but still, crashes after a few minutes. So disappointing. Its a 9700k not 8700 and seeing I can actually boot i dont think its the above mentioned incompatibility. Maybe I will have to RMA after all

hi there 
 
have updated to the bios 1.08 did have xmp but no matter what i do with my royal trident 3200mhz cannot get it above 2133 just black screens untill i cmos reset hope thjis helps anyone having the same problem 
 
specs 
intel i9990k
32 gb royal trident 3200 ddr4
2080ti gigabyte oc windforce
dg-86 case
1600watt titanium supernova
z390 ftw mobo
4tb ssd samsung qvo 
samsung pro 970 nvme 512mb
 

ThaAussieGeneral
hi there 
 
have updated to the bios 1.08 did have xmp but no matter what i do with my royal trident 3200mhz cannot get it above 2133 just black screens untill i cmos reset hope thjis helps anyone having the same problem 
 
specs 
intel i9990k
32 gb royal trident 3200 ddr4
2080ti gigabyte oc windforce
dg-86 case
1600watt titanium supernova
z390 ftw mobo
4tb ssd samsung qvo 
samsung pro 970 nvme 512mb
 

You may need to adjust your vccio and vsa voltages to run 3200.

Try like I did and do not use 3200, but a multiple with 33 in it like 3133 or 3166 or what is available to you in the bios. Maybe even slightly higher like 3233, just not sure what is available above 3000. Like it states a few posts ago, my I-7 memory controller won't use multiples of 100 above 2400. Some say it might be because it's a locked processor.