ASUS Z7S WS. Maximum internal memory: 24 GB. Processor family: Intel, Processor socket: Socket 771. Audio system: Realtek 888S, Audio output channels: 7.1. Width: 305 mm, Depth: 267 mm. Controller (2nd) interface type: Intel ESB2E ICH, Controller interface type: Intel ESB2E ICH, RAID levels: 0, 1