The motherboard schematic for HP Pavilion dv4, Compaq Presario CQ40 laptop/notebook, Consumer AMD 14″ UMA – Ripley 2.0 (NBW20) CPU: AMD S1G3 North Bridge: ATI RS880M South Bridge: ATI SB710 OEM: Compal Electronics, Inc. Document Number: LA-4117P Revision: 0.3