Read every post in the whole thread carefully. The results on the first page are affected by a driver issue that forced the card to operate in 16-bit mode.Such a result is very unexpected.
There are multiple RMAA results available for the card and they are usually 117db or something... Like this one: http://borisgermanov.blogspot.com/2014/04/asus-xonar-essence-stx-rmaa-tests.html
Of course, those result are not AP2 results and ASUS insist that one must use the card's own loop for the RMAA test. (By the way, same as Creative)
Is there any chance that the card detects a RMAA loop and cheat when being tested?
Even on this page (7) you can see some revised measurements.
Also, just to be clear, that 117dB thing in RMAA's summary is dynamic range (DNR), not THD+N(SINAD). They are different measurement metrics.