Creative's Sound Blaster X-Fi Xtreme Audio gives an experience beyond studio quality with MP3 music and movies! Featuring award-winning X-Fi technologies, X-Fi Crystalizer restores the details and vibrance lost during MP3 and DIVX compression, breathing life back into any audio, while X-Fi CMSS-3D expands stereo music and movies into amazing surround sound. Effective over virtually any speakers, including stereo speakers, Sound Blaster X-Fi Xtreme Audio even provides unbelievable surround sound over normal headphones! The low profile design plus digital out for connecting to a home cinema system make it ideal for Media Center PCs. 3.5mm Headphone Out/Line Out (front L/R) Line Out 2 (rear L/R, side L), Line Out 3 (center/sub/side R) 3.5mm Flexijack - Line In / Microphone In / Digital I/O Internal line level Input (via 4-pin Molex connector) Intel HD Audio Compatible Front Panel Header (2x5pin) 2 Year Warranty System Requirements - Windows XP, Pentium 4 1.6 GHz, AMD Athlon XP 2000+, 256 MB RAM, 600 MB Hard Drive, PCI 2.1, CD-ROM Drive