diff --git a/CommonHelpers/GlobalConfig.cs b/CommonHelpers/GlobalConfig.cs
index 83161ed..9500745 100644
--- a/CommonHelpers/GlobalConfig.cs
+++ b/CommonHelpers/GlobalConfig.cs
@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Runtime.InteropServices;
-using System.Text;
-using System.Threading.Tasks;
+using System.Runtime.InteropServices;
 
 namespace CommonHelpers
 {
diff --git a/FanControl/FanControllerSensors.cs b/FanControl/FanControllerSensors.cs
index d5df406..30af3d4 100644
--- a/FanControl/FanControllerSensors.cs
+++ b/FanControl/FanControllerSensors.cs
@@ -71,10 +71,10 @@ namespace FanControl
                             FanMode.Silent, new FanSensor.Profile()
                             {
                                 Type = FanSensor.Profile.ProfileType.Exponential,
-                                MinInput = 55,
-                                MaxInput = 93,
+                                MinInput = 40,
+                                MaxInput = 95,
                                 A = 1.28f,
-                                B = 60f,
+                                B = Settings.Default.Silent4000RPMTemp - 28,
                                 C = 3000f
                             }
                         },
@@ -107,10 +107,10 @@ namespace FanControl
                             FanMode.Silent, new FanSensor.Profile()
                             {
                                 Type = FanSensor.Profile.ProfileType.Exponential,
-                                MinInput = 55,
-                                MaxInput = 93,
+                                MinInput = 40,
+                                MaxInput = 95,
                                 A = 1.28f,
-                                B = 60f,
+                                B = Settings.Default.Silent4000RPMTemp - 28,
                                 C = 3000f
                             }
                         },
diff --git a/FanControl/Settings.cs b/FanControl/Settings.cs
index 0dc4af8..82d769d 100644
--- a/FanControl/Settings.cs
+++ b/FanControl/Settings.cs
@@ -23,9 +23,20 @@ namespace FanControl
             set { Set("AlwaysOnTop", value); }
         }
 
+        public int Silent4000RPMTemp
+        {
+            get { return ClampSilent4000RPMTemp(Get("Silent4000RPMTemp", 85)); }
+            set { Set("Silent4000RPMTemp", ClampSilent4000RPMTemp(value)); }
+        }
+
         public bool EnableExperimentalFeatures
         {
             get { return Instance.IsDEBUG; }
         }
+
+        private int ClampSilent4000RPMTemp(int value)
+        {
+            return Math.Clamp(value, 70, 90);
+        }
     }
 }