Usage Model Description Gen Ii and IIi Electrical Specification Compliance points are located within the SATA mated connectors on both the PC motherboard and device Gen Im and IIm Electrical Specification Compliance points are located on the I/O controller; routes SATA signals on a PCB Gen IX and IIX Electrical Specification Compliance points are located on the I/O controller or canister; SATA signals are routed in back plane.