diff --git a/Core/Compatibility.cpp b/Core/Compatibility.cpp
index e3b866fc21..f21b2ce173 100644
--- a/Core/Compatibility.cpp
+++ b/Core/Compatibility.cpp
@@ -64,6 +64,7 @@ void Compatibility::CheckSettings(IniFile &iniFile, const std::string &gameID) {
 	CheckSetting(iniFile, gameID, "GuardBand", &flags_.GuardBand);
 	CheckSetting(iniFile, gameID, "RequireBufferedRendering", &flags_.RequireBufferedRendering);
 	CheckSetting(iniFile, gameID, "RequireBlockTransfer", &flags_.RequireBlockTransfer);
+	CheckSetting(iniFile, gameID, "RequireDefaultCPUClock", &flags_.RequireDefaultCPUClock);
 	CheckSetting(iniFile, gameID, "DisableReadbacks", &flags_.DisableReadbacks);
 	CheckSetting(iniFile, gameID, "DisableAccurateDepth", &flags_.DisableAccurateDepth);
 }
diff --git a/Core/Compatibility.h b/Core/Compatibility.h
index a84635c789..a7b8654edc 100644
--- a/Core/Compatibility.h
+++ b/Core/Compatibility.h
@@ -18,7 +18,7 @@
 #pragma once
 
 #include <string>
-#include <stdint.h>
+#include <cstdint>
 
 // Compatibility flags are controlled by assets/compat.ini.
 // Alternatively, if PSP/SYSTEM/compat.ini exists, it is merged on top, to enable editing
@@ -55,6 +55,7 @@ struct CompatFlags {
 	bool FakeMipmapChange;
 	bool RequireBufferedRendering;
 	bool RequireBlockTransfer;
+	bool RequireDefaultCPUClock;
 	bool DisableReadbacks;
 	bool HackFixVideo;
 	bool HackFixHangs;
diff --git a/UI/EmuScreen.cpp b/UI/EmuScreen.cpp
index dcb2da690a..6f5126b526 100644
--- a/UI/EmuScreen.cpp
+++ b/UI/EmuScreen.cpp
@@ -226,6 +226,11 @@ void EmuScreen::bootGame(const std::string &filename) {
 		host->NotifyUserMessage(gr->T("BlockTransferRequired", "Warning: This game requires Simulate Block Transfer Mode to be set to On."), 15.0f);
 	}
 
+	if (PSP_CoreParameter().compat.flags().RequireDefaultCPUClock && g_Config.iLockedCPUSpeed != 0) {
+		I18NCategory *gr = GetI18NCategory("Graphics");
+		host->NotifyUserMessage(gr->T("DefaultCPUClockRequired", "Warning: This game requires the CPU clock to be set to default."), 15.0f);
+	}
+
 	loadingViewColor_->Divert(0xFFFFFFFF, 0.15f);
 	loadingViewVisible_->Divert(UI::V_VISIBLE, 0.15f);
 }
diff --git a/assets/compat.ini b/assets/compat.ini
index 93c0f5abf5..e9421e51d7 100644
--- a/assets/compat.ini
+++ b/assets/compat.ini
@@ -435,3 +435,13 @@ ULJM05242 = true
 ULJM05371 = true
 NPJH50304 = true
 ULES00703 = true
+
+[RequireDefaultCPUClock]
+# GOW : Ghost of Sparta
+UCUS98737 = true
+UCAS40323 = true
+NPHG00092 = true
+NPEG00044 = true
+NPJG00120 = true
+UCJS10114 = true
+UCES01401 = true
\ No newline at end of file