https://github.com/LibreHardwareMonitor/LibreHardwareMonitor/issues/566#issuecomment-944841060

LibreHardwareMonitor/LibreHardwareMonitor.csproj

@@ -12,6 +12,7 @@
     <UseWindowsForms>true</UseWindowsForms>
     <OutputPath>..\bin\$(Configuration)\</OutputPath>
 	  <LangVersion>latest</LangVersion>
+    <PlatformTarget>AnyCPU</PlatformTarget>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugType>full</DebugType>

LibreHardwareMonitorLib/Hardware/RyzenSMU.cs

@@ -86,12 +86,14 @@ namespace LibreHardwareMonitor.Hardware
         {
             _cpuCodeName = GetCpuCodeName(family, model, packageType);
 
-            _supportedCPU = SetAddresses(_cpuCodeName);
+            _supportedCPU = Environment.Is64BitOperatingSystem == Environment.Is64BitProcess && SetAddresses(_cpuCodeName);
 
             if (_supportedCPU)
+            {
                 InpOut.Open();
 
-            SetupPmTableAddrAndSize();
+                SetupPmTableAddrAndSize();
+            }
         }
 
         private static CpuCodeName GetCpuCodeName(uint family, uint model, uint packageType)
@@ -274,13 +276,7 @@ namespace LibreHardwareMonitor.Hardware
 
         public float[] GetPmTable()
         {
-            if (!_supportedCPU)
-                return new float[] { 0 };
-
-            if (!SetupPmTableAddrAndSize())
-                return new float[] { 0 };
-
-            if (!TransferTableToDram())
+            if (!_supportedCPU || !TransferTableToDram())
                 return new float[] { 0 };
 
 
@@ -301,10 +297,6 @@ namespace LibreHardwareMonitor.Hardware
         {
             float[] table = new float[_pmTableSize / 4];
 
-            if (_dramBaseAddr > int.MaxValue)
-                return table;
-
-
             byte[] bytes = InpOut.ReadMemory(new IntPtr(_dramBaseAddr), _pmTableSize);
             if (bytes != null)
                 Buffer.BlockCopy(bytes, 0, table, 0, bytes.Length);