public override string GetReport()
        {
            StringBuilder r = new StringBuilder();

            r.AppendLine("Nvidia GPU");
            r.AppendLine();

            r.AppendFormat("Name: {0}{1}", name, Environment.NewLine);
            r.AppendFormat("Index: {0}{1}", adapterIndex, Environment.NewLine);

            if (displayHandle.HasValue && NVAPI.NvAPI_GetDisplayDriverVersion != null)
            {
                NvDisplayDriverVersion driverVersion = new NvDisplayDriverVersion();
                driverVersion.Version = NVAPI.DISPLAY_DRIVER_VERSION_VER;
                if (NVAPI.NvAPI_GetDisplayDriverVersion(displayHandle.Value,
                                                        ref driverVersion) == NvStatus.OK)
                {
                    r.Append("Driver Version: ");
                    r.Append(driverVersion.DriverVersion / 100);
                    r.Append(".");
                    r.Append((driverVersion.DriverVersion % 100).ToString("00",
                                                                          CultureInfo.InvariantCulture));
                    r.AppendLine();
                    r.Append("Driver Branch: ");
                    r.AppendLine(driverVersion.BuildBranch);
                }
            }
            r.AppendLine();

            if (NVAPI.NvAPI_GPU_GetPCIIdentifiers != null)
            {
                uint deviceId, subSystemId, revisionId, extDeviceId;

                NvStatus status = NVAPI.NvAPI_GPU_GetPCIIdentifiers(handle,
                                                                    out deviceId, out subSystemId, out revisionId, out extDeviceId);

                if (status == NvStatus.OK)
                {
                    r.Append("DeviceID: 0x");
                    r.AppendLine(deviceId.ToString("X", CultureInfo.InvariantCulture));
                    r.Append("SubSystemID: 0x");
                    r.AppendLine(subSystemId.ToString("X", CultureInfo.InvariantCulture));
                    r.Append("RevisionID: 0x");
                    r.AppendLine(revisionId.ToString("X", CultureInfo.InvariantCulture));
                    r.Append("ExtDeviceID: 0x");
                    r.AppendLine(extDeviceId.ToString("X", CultureInfo.InvariantCulture));
                    r.AppendLine();
                }
            }

            if (NVAPI.NvAPI_GPU_GetThermalSettings != null)
            {
                NvGPUThermalSettings settings = new NvGPUThermalSettings();
                settings.Version = NVAPI.GPU_THERMAL_SETTINGS_VER;
                settings.Count   = NVAPI.MAX_THERMAL_SENSORS_PER_GPU;
                settings.Sensor  = new NvSensor[NVAPI.MAX_THERMAL_SENSORS_PER_GPU];

                NvStatus status = NVAPI.NvAPI_GPU_GetThermalSettings(handle,
                                                                     (int)NvThermalTarget.ALL, ref settings);

                r.AppendLine("Thermal Settings");
                r.AppendLine();
                if (status == NvStatus.OK)
                {
                    for (int i = 0; i < settings.Count; i++)
                    {
                        r.AppendFormat(" Sensor[{0}].Controller: {1}{2}", i,
                                       settings.Sensor[i].Controller, Environment.NewLine);
                        r.AppendFormat(" Sensor[{0}].DefaultMinTemp: {1}{2}", i,
                                       settings.Sensor[i].DefaultMinTemp, Environment.NewLine);
                        r.AppendFormat(" Sensor[{0}].DefaultMaxTemp: {1}{2}", i,
                                       settings.Sensor[i].DefaultMaxTemp, Environment.NewLine);
                        r.AppendFormat(" Sensor[{0}].CurrentTemp: {1}{2}", i,
                                       settings.Sensor[i].CurrentTemp, Environment.NewLine);
                        r.AppendFormat(" Sensor[{0}].Target: {1}{2}", i,
                                       settings.Sensor[i].Target, Environment.NewLine);
                    }
                }
                else
                {
                    r.Append(" Status: ");
                    r.AppendLine(status.ToString());
                }
                r.AppendLine();
            }

            if (NVAPI.NvAPI_GPU_GetAllClocks != null)
            {
                NvClocks allClocks = new NvClocks();
                allClocks.Version = NVAPI.GPU_CLOCKS_VER;
                allClocks.Clock   = new uint[NVAPI.MAX_CLOCKS_PER_GPU];
                NvStatus status = NVAPI.NvAPI_GPU_GetAllClocks(handle, ref allClocks);

                r.AppendLine("Clocks");
                r.AppendLine();
                if (status == NvStatus.OK)
                {
                    for (int i = 0; i < allClocks.Clock.Length; i++)
                    {
                        if (allClocks.Clock[i] > 0)
                        {
                            r.AppendFormat(" Clock[{0}]: {1}{2}", i, allClocks.Clock[i],
                                           Environment.NewLine);
                        }
                    }
                }
                else
                {
                    r.Append(" Status: ");
                    r.AppendLine(status.ToString());
                }
                r.AppendLine();
            }

            if (NVAPI.NvAPI_GPU_GetTachReading != null)
            {
                int      tachValue;
                NvStatus status = NVAPI.NvAPI_GPU_GetTachReading(handle, out tachValue);

                r.AppendLine("Tachometer");
                r.AppendLine();
                if (status == NvStatus.OK)
                {
                    r.AppendFormat(" Value: {0}{1}", tachValue, Environment.NewLine);
                }
                else
                {
                    r.Append(" Status: ");
                    r.AppendLine(status.ToString());
                }
                r.AppendLine();
            }

            if (NVAPI.NvAPI_GPU_GetPStates != null)
            {
                NvPStates states = new NvPStates();
                states.Version = NVAPI.GPU_PSTATES_VER;
                states.PStates = new NvPState[NVAPI.MAX_PSTATES_PER_GPU];
                NvStatus status = NVAPI.NvAPI_GPU_GetPStates(handle, ref states);

                r.AppendLine("P-States");
                r.AppendLine();
                if (status == NvStatus.OK)
                {
                    for (int i = 0; i < states.PStates.Length; i++)
                    {
                        if (states.PStates[i].Present)
                        {
                            r.AppendFormat(" Percentage[{0}]: {1}{2}", i,
                                           states.PStates[i].Percentage, Environment.NewLine);
                        }
                    }
                }
                else
                {
                    r.Append(" Status: ");
                    r.AppendLine(status.ToString());
                }
                r.AppendLine();
            }

            if (NVAPI.NvAPI_GPU_GetUsages != null)
            {
                NvUsages usages = new NvUsages();
                usages.Version = NVAPI.GPU_USAGES_VER;
                usages.Usage   = new uint[NVAPI.MAX_USAGES_PER_GPU];
                NvStatus status = NVAPI.NvAPI_GPU_GetUsages(handle, ref usages);

                r.AppendLine("Usages");
                r.AppendLine();
                if (status == NvStatus.OK)
                {
                    for (int i = 0; i < usages.Usage.Length; i++)
                    {
                        if (usages.Usage[i] > 0)
                        {
                            r.AppendFormat(" Usage[{0}]: {1}{2}", i,
                                           usages.Usage[i], Environment.NewLine);
                        }
                    }
                }
                else
                {
                    r.Append(" Status: ");
                    r.AppendLine(status.ToString());
                }
                r.AppendLine();
            }

            if (NVAPI.NvAPI_GPU_GetCoolerSettings != null)
            {
                NvGPUCoolerSettings settings = new NvGPUCoolerSettings();
                settings.Version = NVAPI.GPU_COOLER_SETTINGS_VER;
                settings.Cooler  = new NvCooler[NVAPI.MAX_COOLER_PER_GPU];
                NvStatus status =
                    NVAPI.NvAPI_GPU_GetCoolerSettings(handle, 0, ref settings);

                r.AppendLine("Cooler Settings");
                r.AppendLine();
                if (status == NvStatus.OK)
                {
                    for (int i = 0; i < settings.Count; i++)
                    {
                        r.AppendFormat(" Cooler[{0}].Type: {1}{2}", i,
                                       settings.Cooler[i].Type, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].Controller: {1}{2}", i,
                                       settings.Cooler[i].Controller, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].DefaultMin: {1}{2}", i,
                                       settings.Cooler[i].DefaultMin, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].DefaultMax: {1}{2}", i,
                                       settings.Cooler[i].DefaultMax, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].CurrentMin: {1}{2}", i,
                                       settings.Cooler[i].CurrentMin, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].CurrentMax: {1}{2}", i,
                                       settings.Cooler[i].CurrentMax, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].CurrentLevel: {1}{2}", i,
                                       settings.Cooler[i].CurrentLevel, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].DefaultPolicy: {1}{2}", i,
                                       settings.Cooler[i].DefaultPolicy, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].CurrentPolicy: {1}{2}", i,
                                       settings.Cooler[i].CurrentPolicy, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].Target: {1}{2}", i,
                                       settings.Cooler[i].Target, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].ControlType: {1}{2}", i,
                                       settings.Cooler[i].ControlType, Environment.NewLine);
                        r.AppendFormat(" Cooler[{0}].Active: {1}{2}", i,
                                       settings.Cooler[i].Active, Environment.NewLine);
                    }
                }
                else
                {
                    r.Append(" Status: ");
                    r.AppendLine(status.ToString());
                }
                r.AppendLine();
            }

            if (NVAPI.NvAPI_GPU_GetMemoryInfo != null && displayHandle.HasValue)
            {
                NvMemoryInfo memoryInfo = new NvMemoryInfo();
                memoryInfo.Version = NVAPI.GPU_MEMORY_INFO_VER;
                memoryInfo.Values  = new uint[NVAPI.MAX_MEMORY_VALUES_PER_GPU];
                NvStatus status = NVAPI.NvAPI_GPU_GetMemoryInfo(displayHandle.Value,
                                                                ref memoryInfo);

                r.AppendLine("Memory Info");
                r.AppendLine();
                if (status == NvStatus.OK)
                {
                    for (int i = 0; i < memoryInfo.Values.Length; i++)
                    {
                        r.AppendFormat(" Value[{0}]: {1}{2}", i,
                                       memoryInfo.Values[i], Environment.NewLine);
                    }
                }
                else
                {
                    r.Append(" Status: ");
                    r.AppendLine(status.ToString());
                }
                r.AppendLine();
            }

            return(r.ToString());
        }
        public override void Update()
        {
            NvGPUThermalSettings settings = GetThermalSettings();

            foreach (Sensor sensor in temperatures)
            {
                sensor.Value = settings.Sensor[sensor.Index].CurrentTemp;
            }

            if (fan != null)
            {
                int value = 0;
                NVAPI.NvAPI_GPU_GetTachReading(handle, out value);
                fan.Value = value;
            }

            uint[] values = GetClocks();
            if (values != null)
            {
                clocks[0].Value = 0.001f * values[0];
                clocks[1].Value = 0.001f * values[8];
                clocks[2].Value = 0.001f * values[14];
                if (values[30] != 0)
                {
                    clocks[0].Value = 0.0005f * values[30];
                    clocks[2].Value = 0.001f * values[30];
                }
            }

            NvPStates states = new NvPStates();

            states.Version = NVAPI.GPU_PSTATES_VER;
            states.PStates = new NvPState[NVAPI.MAX_PSTATES_PER_GPU];
            if (NVAPI.NvAPI_GPU_GetPStates != null &&
                NVAPI.NvAPI_GPU_GetPStates(handle, ref states) == NvStatus.OK)
            {
                for (int i = 0; i < 3; i++)
                {
                    if (states.PStates[i].Present)
                    {
                        loads[i].Value = states.PStates[i].Percentage;
                        ActivateSensor(loads[i]);
                    }
                }
            }
            else
            {
                NvUsages usages = new NvUsages();
                usages.Version = NVAPI.GPU_USAGES_VER;
                usages.Usage   = new uint[NVAPI.MAX_USAGES_PER_GPU];
                if (NVAPI.NvAPI_GPU_GetUsages != null &&
                    NVAPI.NvAPI_GPU_GetUsages(handle, ref usages) == NvStatus.OK)
                {
                    loads[0].Value = usages.Usage[2];
                    loads[1].Value = usages.Usage[6];
                    loads[2].Value = usages.Usage[10];
                    for (int i = 0; i < 3; i++)
                    {
                        ActivateSensor(loads[i]);
                    }
                }
            }


            NvGPUCoolerSettings coolerSettings = GetCoolerSettings();

            if (coolerSettings.Count > 0)
            {
                control.Value = coolerSettings.Cooler[0].CurrentLevel;
                ActivateSensor(control);
            }

            NvMemoryInfo memoryInfo = new NvMemoryInfo();

            memoryInfo.Version = NVAPI.GPU_MEMORY_INFO_VER;
            memoryInfo.Values  = new uint[NVAPI.MAX_MEMORY_VALUES_PER_GPU];
            if (NVAPI.NvAPI_GPU_GetMemoryInfo != null && displayHandle.HasValue &&
                NVAPI.NvAPI_GPU_GetMemoryInfo(displayHandle.Value, ref memoryInfo) ==
                NvStatus.OK)
            {
                uint  totalMemory = memoryInfo.Values[0];
                uint  freeMemory  = memoryInfo.Values[4];
                float usedMemory  = Math.Max(totalMemory - freeMemory, 0);
                memoryLoad.Value = 100f * usedMemory / totalMemory;
                ActivateSensor(memoryLoad);
            }
        }