So that basically confirms what I went through when I was getting my dual rank 2x16g 3200 tridantZ cl14 kit setup on my 1800x. I have a gigabyte gaming 5 mobo. I ended up with the exact same cl timing hole. So anything below cl 18 wouldn't post (I only tried down to 14) but 18 was fine. Kept the timings at 18 16 16 35 instead.