Full-duplex 5.1 channel PCI-Express sound card VIA VT1723 Envy24D multi-channel sound chip is adopted Compliant with PCI-Express x1 specification revision 1.1 Complies with AC'97 revision 2.3 Sound sampling rate 24-bit, 48 KHz support playback and recording Supports front-facing L/R, surround L/R, Centre/Subwoofer, S/PDIF-Out The optional daughter card supports rear surround L/R, linear input L/R, mono Mic-In, S/PDIF-In Noise balance cancellation function when the PC is powered off or on System requirements: Operating system supports MSWin10/Windows 7/Vista/XP/Server 2003-2008 32/64-bit, 2000, ME, 98SE OS PC with PCI-Express slot Specification: Interface: PCI-E Supported channels: 5.1 channels Chip: CMI8738 Sound support: Dolby Digital EX decoding, EAX 4.0, Dolby Digital AC-3 decoding, DirectSound 3D, Multi Speaker Surround3D Installation method: Built-in Product size: 20*15*8cm Product weight: 0.12KG