PCI Express x1, 5.1 ChannelsTOSLink Optical Input and OutputSound Core 3D ProcessorBeamforming MicrophoneDesigned around the powerful Sound Core3D™ audio processor, the Sound Blaster Z series once again raises the bar for the industry standard of PCIe sound cards. PCI Express Sound Card has been designed to meet the standards of those who want a vastly superior experience over motherboard audio. With external DACs delivering 116dB SNR, a 600 ohm audiophile-grade headphone amp, and massively customizable Pro S-TEK technologies, Sound packs a serious audio punch.