public override _SubDevice Extend(dynamic wprObj)
            {
                List <WprManagementObject> obj     = wprObj as List <WprManagementObject>;
                WprManagementObject        current = obj.Where(d => d.GetProperty("DeviceID").AsSubString(3, 1).Equals(Name.AsSubString(0, 1))).FirstOrDefault();

                MaxSpeed = current == null ? null : current.GetProperty("MaxClockSpeed");

                if (MaxSpeed == null || PercentProcessorPerformance == null)                         // use base frequency for tboost
                {
                    Frequency = ProcessorFrequency;
                }
                else
                {
                    Frequency = new MobProperty((MaxSpeed.AsInt() / 100) * PercentProcessorPerformance.AsInt());
                }

                return(this);
            }