ASUS Xonar Essence ST, 7.1 channels, Internal, 24 bit, 124 dB, PCI
ASUS Xonar Essence ST. Audio output channels: 7.1 channels, Audio quality: 24 bit, Line-out Signal-to-Noise Ratio (SNR): 124 dB. Host interface: PCI. Total Harmonic Distortion (THD): 0.0003%. Compatible operating systems: Windows Vista/XP(32/64bit)/MCE2005