diff --git a/pcsx2/GS/Renderers/Common/GSRenderer.cpp b/pcsx2/GS/Renderers/Common/GSRenderer.cpp
index 61e42ba2db..96a83ca297 100644
--- a/pcsx2/GS/Renderers/Common/GSRenderer.cpp
+++ b/pcsx2/GS/Renderers/Common/GSRenderer.cpp
@@ -687,13 +687,23 @@ void GSRenderer::VSync(u32 field, bool registers_written)
 			src_rect, current->GetSize(), g_host_display->GetDisplayAlignment(), g_host_display->UsesLowerLeftOrigin(),
 			GetVideoMode() == GSVideoMode::SDTV_480P || (GSConfig.PCRTCOverscan && GSConfig.PCRTCOffsets));
 
-		if (GSConfig.CASMode != GSCASMode::Disabled && g_gs_device->Features().cas_sharpening)
+		if (GSConfig.CASMode != GSCASMode::Disabled)
 		{
-			// sharpen only if the IR is higher than the display resolution
-			const bool sharpen_only = (GSConfig.CASMode == GSCASMode::SharpenOnly ||
-									   (current->GetWidth() > g_host_display->GetWindowWidth() &&
-										   current->GetHeight() > g_host_display->GetWindowHeight()));
-			g_gs_device->CAS(current, src_rect, src_uv, draw_rect, sharpen_only);
+			static bool cas_log_once = false;
+			if (g_gs_device->Features().cas_sharpening)
+			{
+				// sharpen only if the IR is higher than the display resolution
+				const bool sharpen_only = (GSConfig.CASMode == GSCASMode::SharpenOnly ||
+										   (current->GetWidth() > g_host_display->GetWindowWidth() &&
+											   current->GetHeight() > g_host_display->GetWindowHeight()));
+				g_gs_device->CAS(current, src_rect, src_uv, draw_rect, sharpen_only);
+			}
+			else if (!cas_log_once)
+			{
+				Host::AddIconOSDMessage("CASUnsupported", ICON_FA_EXCLAMATION_TRIANGLE,
+					"CAS is not available, your graphics driver does not support the required functionality.", 10.0f);
+				cas_log_once = true;
+			}
 		}
 	}
 
diff --git a/pcsx2/GS/Renderers/OpenGL/GSDeviceOGL.cpp b/pcsx2/GS/Renderers/OpenGL/GSDeviceOGL.cpp
index 9048c6f82f..11d069acdd 100644
--- a/pcsx2/GS/Renderers/OpenGL/GSDeviceOGL.cpp
+++ b/pcsx2/GS/Renderers/OpenGL/GSDeviceOGL.cpp
@@ -414,11 +414,8 @@ bool GSDeviceOGL::Create()
 		m_shadeboost.ps.SetName("Shadeboost pipe");
 	}
 
-	if (!CreateCASPrograms() && GSConfig.CASMode != GSCASMode::Disabled)
-	{
-		Host::AddIconOSDMessage("CASUnsupported", ICON_FA_EXCLAMATION_TRIANGLE,
-			"CAS is not available, your graphics driver does not supported the required functionality.", 10.0f);
-	}
+	// Image load store and GLSL 420pack is core in GL4.2, no need to check.
+	m_features.cas_sharpening = ((GLAD_GL_VERSION_4_2 && GLAD_GL_ARB_compute_shader) || GLAD_GL_ES_VERSION_3_2) && CreateCASPrograms();
 
 	// ****************************************************************
 	// rasterization configuration
@@ -1543,14 +1540,6 @@ void GSDeviceOGL::ClearSamplerCache()
 
 bool GSDeviceOGL::CreateCASPrograms()
 {
-	// Image load store and GLSL 420pack is core in GL4.2, no need to check.
-	m_features.cas_sharpening = (GLAD_GL_VERSION_4_2 && GLAD_GL_ARB_compute_shader) || GLAD_GL_ES_VERSION_3_2;
-	if (!m_features.cas_sharpening)
-	{
-		Console.Warning("Compute shaders not supported, CAS is unavailable.");
-		return false;
-	}
-
 	std::optional<std::string> cas_source(Host::ReadResourceFileToString("shaders/opengl/cas.glsl"));
 	if (!cas_source.has_value() || !GetCASShaderSource(&cas_source.value()))
 	{