I have X-Fi Titanium HD and measured it. If you are "not so sure", see for yourself and stop making speculations.
as I said I had a lot of soundcards over the years, I modded the hell out of them, even though not bad, they are not even close to a cd player or external dac, as Amir showed with asus essence review, soundcards are far from the 120 db dynamic range..
They just publish the dac chip dynamic range and not the whole product.
I advice not to lose time or money with soundcards..