Creative Labs Sound Blaster X-Fi Surround 5.1 Pro. Audio quality: 24 bit, Audio output channels: 2.0, Digital-to-Analog Conversion (DAC): 24-bit/96kHz. Host interface: USB. Minimum RAM: 1000 MB, Minimum processor: Intel Core 2 Duo, AMD - 2.2 GHz, Minimum hard disk space: 600 MB