Shuttle K45S. Processor socket: Socket 775, Processor front side buses supported: 533/800/1066 MHz, Compatible processor series: Celeron D 4xx. Supported hard disk drive interfaces: Serial-ATA II. Maximum internal memory: 2 GB, Memory slots: 2x DIMM. Graphic adapter: GMA 950, Maximum graphic adapter memory: 224 MB. Audio output channels: 5.1, Audio system: Realtek ALC 662