Love my new board, but getting it to post has been a PITA so far. Initially ran into some CPU issues and got help from EVGA support. When I finally got it to post successfully, had two sticks of G.Skill Trident Z RGB 3200mhz CL16 in slots 2/4 and one stick G.Skill Ripjaws V 3200mhz CL16 in slot 3. Updated BIOS so I could install i-7 9700kf, but afterwards board went back to error loop, regardless of which slots I put the memory in, or which CPU I used (also have an i-3 8350k). Have read just about everything looking for possible solutions, tried unplugging GPU, everything but keyboard, clearing CMOS, flashing different BIOS versions, but still getting consistent code loop on debug: 7F, 00, 4C. Memory worked fine on my X99 Classy, so seems odd that it would cause problems on a much newer board/platform. Checked the compatibility list, which might be in need of an update, and it seems the Z390 FTW requires lower latency memory (CL14) for some reason. Have tried leaving everything on auto/default settings in BIOS as well as changing timings, etc...will post with one stick, but any more than that and it's a no-go. Board powers up, RGB LEDs on GPU, RAM, and case light up, fans spin, etc. yet board won't post. Already shelled out for the 8350k to update BIOS (then swap out for 9700kf), and the sticks are fairly new. Would hate to spend add'l $ for more memory...if anyone knows of a workaround or can offer suggestions, I'd appreciate it a lot. Thanks!

Did you try 1 stick only?

Sajin
Either use the ripjawz, or the tridents. Don't use them both at the same time.

Like Sajin said, don't mix memory on this board. They don't have to be matched sets, but same part number from same manufacturer should work.
When you did get it running with 1 stick, what timings did the board set up at?