with xmp & turbo boost disabled, it drops to 1333, with it enabled 1600 - if it helps, ram is Gskill Ripjaws, and the part number was one on ASUS's qualified vendor list.- i remembered asus had said to be sure the ram was XMP rated and this particular ram is.
but that brings up another bug, i assume in the bios - dis-abling xmp didn't always drop the ram freq, and if turbo was enabled, it would still be 1600. I noticed it was varying unpredictably on that freq before the CMOS clearing.
here's a shot of a test i just ran - it took it 2.5 minutes into the test for temps to climb above 75C. Another thing i've noticed - before TDP, when it was over heating, TDP never went above 58W, even with the limit up at 256A. Now with temps down to a reasonable range, TDP is up to 68-69W - so earlier I had higher temps from less heat, and now lower temps from more heat. It could just be an illusion - i have no idea.