SIENOC PCI-E 5 Channel 4.1 3D Audio Stereo Internal PCI Sound Card Window Vista 7 32 64 Bit for Windows XP/2000/NT/ME/98SE/98/WIN3.1, Linux Desktop Computer Connector : Line-In, MIC In, 2 x speaker out, MPU-401 port, dual game ports Powerful C-Media 8738 Chipset HRTF-based 3D extension positional audio, supports Microsoft's Directsound 3D, Aureal's A3D Build-in 16 bit full duplex CODEC PCI 2.2 compatible, PC98 specifications compatible Compatible with Microsoft API 32-bit PCI bus master, 5-ch 16-bit DAC Legacy audio SB pro compatible Supports rear side speakers, CS3D positional audio in 4-ch speaker mode Supports Windows XP/2000/NT/ME/98SE/98/WIN3.1, Linux Note:The Game MIDI Port can not be used.