ECS 945P-A. Supported memory types: DDR2 667/533/400, Maximum internal memory: 4 GB. Processor family: Intel, Processor socket: Socket 775, Processors compatible: Intel Core2 Extreme/CoreTM2 Duo/Pentium 4/Pentium D/Celeron D. Audio system: ALC655, Audio output channels: 5.1. Width: 305 mm, Depth: 244 mm. Controller (2nd) interface type: Ultra DMA100/66, Controller interface type: Serial ATA2