Its a
Asus P5B Deluxe motherboard, which has on board audio.
ADI® AD1988B 8-channel High Definition Audio CODEC
- Support Jack-Sensing, Enumeration, Multi-streaming and Jack-Retasking
- Coaxial / Optical S/PDIF out ports at back I/O
- ASUS Noise Filter
- ASUS Array Mic
I have 2GB RAM.