diff --git a/lib/common/helper/system_helper.dart b/lib/common/helper/system_helper.dart
index 094b18e..ff13e5e 100644
--- a/lib/common/helper/system_helper.dart
+++ b/lib/common/helper/system_helper.dart
@@ -218,9 +218,26 @@ foreach ($adapter in $adapterMemory) {
     return int.tryParse(cpuNumberResult.stdout.toString().trim()) ?? 0;
   }
 
-  static Future<int?> getCpuAffinity(int eCoreCount) async {
+  static Future<String?> getCpuAffinity(int eCoreCount) async {
     final cpuNumber = await getNumberOfLogicalProcessors();
-    if (cpuNumber == 0) return null;
-    return (1 << cpuNumber) - (1 << eCoreCount);
+    if (cpuNumber == 0 || eCoreCount == 0 || eCoreCount > cpuNumber) {
+      return null;
+    }
+
+    StringBuffer sb = StringBuffer();
+    for (var i = 0; i < cpuNumber; i++) {
+      if (i < eCoreCount) {
+        sb.write("0");
+      } else {
+        sb.write("1");
+      }
+    }
+    final binaryString = sb.toString();
+    int hexDigits = (binaryString.length / 4).ceil();
+    dPrint("Affinity sb ==== $sb");
+    return int.parse(binaryString, radix: 2)
+        .toRadixString(16)
+        .padLeft(hexDigits, '0')
+        .toUpperCase();
   }
 }
diff --git a/lib/ui/home/home_ui_model.dart b/lib/ui/home/home_ui_model.dart
index 1f7b4fe..c36d1db 100644
--- a/lib/ui/home/home_ui_model.dart
+++ b/lib/ui/home/home_ui_model.dart
@@ -527,7 +527,7 @@ class HomeUIModel extends BaseUIModel {
   }
 
   doLaunchGame(String launchExe, List<String> args, String installPath,
-      int? processorAffinity) async {
+      String? processorAffinity) async {
     _isGameRunning[installPath] = true;
     notifyListeners();
     try {
@@ -537,13 +537,14 @@ class HomeUIModel extends BaseUIModel {
         dPrint('stdout: ${result.stdout}');
         dPrint('stderr: ${result.stderr}');
       } else {
+        dPrint("set Affinity === $processorAffinity ");
         ProcessResult result = await Process.run("cmd.exe", [
           '/C',
           'Start',
           '"StarCitizen"',
           '/High',
           '/Affinity',
-          '$processorAffinity',
+          processorAffinity,
           launchExe,
           ...args
         ]);