Creative Labs X-Fi Xtreme Audio PCI-E. Audio quality: 24 bit, Audio output channels: 7.1, Line-out Signal-to-Noise Ratio (SNR): 108 dB. Host interface: PCI-E. Minimum RAM: 256 MB, Minimum processor: Intel Pentium 4 1.6 GHz, AMD Athlon XP 2000+, Minimum hard disk space: 600 MB