diff --git a/common/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java b/common/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java
index 462602cc..cc515a34 100644
--- a/common/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java
+++ b/common/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java
@@ -162,6 +162,7 @@ public class ModernFixEarlyConfig {
             .put("mixin.perf.faster_item_rendering", false)
             .put("mixin.feature.spam_thread_dump", false)
             .put("mixin.feature.snapshot_easter_egg", true)
+            .put("mixin.feature.warn_missing_perf_mods", true)
             .put("mixin.feature.spark_profile_launch", false)
             .put("mixin.devenv", isDevEnv)
             .put("mixin.perf.remove_spawn_chunks", isDevEnv)
diff --git a/common/src/main/resources/assets/modernfix/lang/en_us.json b/common/src/main/resources/assets/modernfix/lang/en_us.json
index 5e4fb72d..061363ff 100644
--- a/common/src/main/resources/assets/modernfix/lang/en_us.json
+++ b/common/src/main/resources/assets/modernfix/lang/en_us.json
@@ -3,6 +3,8 @@
   "key.modernfix.config": "Open config screen",
   "modernfix.jei_load": "Loading JEI, this may take a while",
   "modernfix.no_lazydfu": "LazyDFU is not installed. If Minecraft needs to update game data from an older version, there may be noticeable lag.",
+  "modernfix.no_ferritecore": "FerriteCore is not installed. Memory usage will be very high.",
+  "modernfix.perf_mod_warning": "It is recommended to install the mods, but the warning(s) can be disabled in the ModernFix config.",
   "modernfix.config": "ModernFix mixin config",
   "modernfix.config.done_restart": "Done (restart required)",
   "modernfix.option.on": "on",
diff --git a/forge/src/main/java/org/embeddedt/modernfix/forge/init/ModernFixForge.java b/forge/src/main/java/org/embeddedt/modernfix/forge/init/ModernFixForge.java
index 687379de..99bc48ba 100644
--- a/forge/src/main/java/org/embeddedt/modernfix/forge/init/ModernFixForge.java
+++ b/forge/src/main/java/org/embeddedt/modernfix/forge/init/ModernFixForge.java
@@ -1,5 +1,6 @@
 package org.embeddedt.modernfix.forge.init;
 
+import com.google.common.collect.ImmutableList;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Item;
 import net.minecraftforge.api.distmarker.Dist;
@@ -19,6 +20,7 @@ import net.minecraftforge.registries.ForgeRegistries;
 import net.minecraftforge.registries.RegisterEvent;
 import net.minecraftforge.server.ServerLifecycleHooks;
 import org.embeddedt.modernfix.ModernFix;
+import org.embeddedt.modernfix.core.ModernFixMixinPlugin;
 import org.embeddedt.modernfix.forge.classloading.ClassLoadHack;
 import org.embeddedt.modernfix.forge.classloading.ModFileScanDataDeduplicator;
 import org.embeddedt.modernfix.forge.ModernFixConfig;
@@ -27,6 +29,8 @@ import org.embeddedt.modernfix.forge.config.ConfigFixer;
 import org.embeddedt.modernfix.forge.packet.PacketHandler;
 import org.embeddedt.modernfix.forge.registry.ObjectHolderClearer;
 
+import java.util.List;
+
 @Mod(ModernFix.MODID)
 public class ModernFixForge {
     private static ModernFix commonMod;
@@ -66,15 +70,24 @@ public class ModernFixForge {
         }
     }
 
-    private static boolean dfuModPresent() {
-        return true; /* new DFU isn't worth warning about */
-    }
+    private static final List<Pair<List<String>, String>> MOD_WARNINGS = ImmutableList.of(
+            Pair.of(ImmutableList.of("ferritecore"), "modernfix.no_ferritecore")
+    );
 
     @SubscribeEvent
     public void commonSetup(FMLCommonSetupEvent event) {
-        if(!dfuModPresent()) {
+        if(ModernFixMixinPlugin.instance.isOptionEnabled("feature.warn_missing_perf_mods.Warnings")) {
             event.enqueueWork(() -> {
-                ModLoader.get().addWarning(new ModLoadingWarning(ModLoadingContext.get().getActiveContainer().getModInfo(), ModLoadingStage.COMMON_SETUP, "modernfix.no_lazydfu"));
+                boolean atLeastOneWarning = false;
+                for(Pair<List<String>, String> warning : MOD_WARNINGS) {
+                    boolean isPresent = !FMLLoader.isProduction() || warning.getLeft().stream().anyMatch(name -> ModList.get().isLoaded(name));
+                    if(!isPresent) {
+                        atLeastOneWarning = true;
+                        ModLoader.get().addWarning(new ModLoadingWarning(ModLoadingContext.get().getActiveContainer().getModInfo(), ModLoadingStage.COMMON_SETUP, warning.getRight()));
+                    }
+                }
+                if(atLeastOneWarning)
+                    ModLoader.get().addWarning(new ModLoadingWarning(ModLoadingContext.get().getActiveContainer().getModInfo(), ModLoadingStage.COMMON_SETUP, "modernfix.perf_mod_warning"));
             });
         }
         ObjectHolderClearer.clearThrowables();