OH MY FREAKING GOD! I can't believe I've done it! I managed to get them to work at 3200 speed! And you want to know how? By a freaking miracle and fear!
Why fear? Because with all the changes I've made in the bios, I got scared and wanted to go set all to default, so maybe something won't mess up after a while.
Then I wen't and just switched XMP on once more. Because.. why not? Did a reboot and BAM! There is it!
This might sound cheesy, but I'm glad I've watched Linus since NCIX days otherwise I would've have tried asking for help here!
Thank you all for trying to help me out and thanks for this community!