Diamond XS51 XtremeSound 5.1 PCI 16 bit Sound Card for windows 7, 8.1 Dolby EX and DTS formats 5.1 channel DVD playback 48K/16 bit playback; 48K/16bit recording 5.1 virtual speaker shifter providing surround sound for CDs, and MP3s EAX 2.0 and A3D sound support PCI 2.2 Interface with bus mastering and burst modes Operating System :	WIN 8.1, WIN 8, WIN 7 32 , WIN 7 64, WINVISTA32 , WINVISTA64, WINXP , WINXP64, WIN2000 , MCE System CPU :AMD Athlon or Intel Pentium 4 CPU Speed :850 MHZ System Memory :1024MB Hard Disk Space :	20 MB CD DVD :YES , BUS :PCI Available Slot :SINGLE Warranty : One Year Limited Warranty