Manually overclocking 2 dual ram kits

[carlbbinneman]

Greetings,

I have read many threads telling me I had made the wrong choice when getting 2 memory kits instead of 1.
What does someone do once they are already in this situation?

Everything is fine without XMP enabled, enabling causes boot failure as discovered in many other posts.
What is the method used and what settings would I need to manually overclock to the XMP speed?

Thanks in advance to anyone willing to help me out.
My specs are as follows :
RAM : G.Skill F4-3866C18D-16GTZR (2 of these kits)
CPU : 7700K
MOBO : Gigabyte Aorus Gaming 9 Z270X

Sorry for any noobery, this be my first post

Update :

There was an issue (RGB related) with one of the kits and it had to be RMA'd.
I will post the results from the supplied answers (many thanks btw) as soon as I have all my sticks again

Update :

During RMA I managed to refund the other kit as well. Both were replaced with a single, 4 stick kit.
Thank you all for your efforts. I hope someone can use the information you provided.

 

[gskill support]

Make sure each kit is installed in the same color slots.

With XMP enabled, lower DRAM Frequency until the system can boot. Report back with the result.

 

[Zerk2012]

Manually set the timings to 14-14-14- 34, set the voltage to 1.35 and the speed to 3000.
If you wish to try to get it to 3866 your probably going to also need to overclock the processor.
Just because the board supports 3866 and the memory is rated 3866 does not mean you will get it stable at that speed as with any overclock setting their no guarantee.
Option 2 overclock your processor to the 4.7 area (with proper cooling) enable XMP and bump the voltage up to 1.37.