I am upgrading from Audiotrak Prodigy HD2 to Asus Xonar Essence STX. Prodigy HD2 is great soundcard, but only for PCI and it needs 12 W on 5VSB rail from PSU (and I am moving to new low-power PC with PSU only with 10 W 5VSB). But before that, I am testing both soundcards in my old PC, with...