diff --git a/CodeLegacy/IO/Config.cs b/CodeLegacy/IO/Config.cs
index 43c8bbf..011528d 100644
--- a/CodeLegacy/IO/Config.cs
+++ b/CodeLegacy/IO/Config.cs
@@ -45,14 +45,17 @@ namespace Flowframes.IO
             }
         }
 
-        public static void Set(Key key, string value)
+        public static void Set(Key key, string value, bool allowIfExists = true)
         {
-            Set(key.ToString(), value);
+            Set(key.ToString(), value, allowIfExists);
         }
 
-        public static void Set(string str, string value)
+        public static void Set(string str, string value, bool allowIfExists = true)
         {
             // Reload();
+            if (!allowIfExists && CachedValues.ContainsKey(str))
+                return;
+
             CachedValues[str] = value;
             WriteConfig();
         }
diff --git a/CodeLegacy/Os/VulkanUtils.cs b/CodeLegacy/Os/VulkanUtils.cs
index f9f9ea4..af48dbc 100644
--- a/CodeLegacy/Os/VulkanUtils.cs
+++ b/CodeLegacy/Os/VulkanUtils.cs
@@ -76,13 +76,13 @@ namespace Flowframes.Os
             if (VkDevices.Count == 0)
             {
                 Logger.Log($"No Vulkan-capable GPUs found. NCNN implementations will run on the CPU instead and may be unstable.");
-                Config.Set(Config.Key.ncnnGpus, "-1"); // -1 = CPU
+                Config.Set(Config.Key.ncnnGpus, "-1", allowIfExists: false); // -1 = CPU
                 return;
             }
 
             // Set the device that has the most compute queues as default GPU
             var maxQueuesDevice = VkDevices.OrderByDescending(d => d.ComputeQueueCount).First();
-            Config.Set(Config.Key.ncnnGpus, $"{maxQueuesDevice.Id}");
+            Config.Set(Config.Key.ncnnGpus, $"{maxQueuesDevice.Id}", allowIfExists: false);
         }
 
         public static int GetMaxNcnnThreads(int deviceId)