diff --git a/plugins/GSdx/GLLoader.cpp b/plugins/GSdx/GLLoader.cpp
index e3845a8113..b7ef058879 100644
--- a/plugins/GSdx/GLLoader.cpp
+++ b/plugins/GSdx/GLLoader.cpp
@@ -447,9 +447,8 @@ namespace GLLoader {
 				// GL4.2
 				if (ext.compare("GL_ARB_shading_language_420pack") == 0) found_GL_ARB_shading_language_420pack = true;
 				if (ext.compare("GL_ARB_texture_storage") == 0) found_GL_ARB_texture_storage = true;
-				// Only enable this extension on nvidia
-				// It is too costly on perf (big upscaling), code need to updated to reduce the number of draw stage
-				//if (nvidia_buggy_driver && ext.compare("GL_ARB_shader_image_load_store") == 0) found_GL_ARB_shader_image_load_store = true;
+				// (I'm not sure AMD supports correctly GL_ARB_shader_image_load_store
+				if (ext.compare("GL_ARB_shader_image_load_store") == 0) found_GL_ARB_shader_image_load_store = true;
 				// GL4.3
 				if (ext.compare("GL_ARB_copy_image") == 0) found_GL_ARB_copy_image = true;
 				if (ext.compare("GL_ARB_explicit_uniform_location") == 0) found_GL_ARB_explicit_uniform_location = true;
diff --git a/plugins/GSdx/GSLinuxDialog.cpp b/plugins/GSdx/GSLinuxDialog.cpp
index 9693e94459..c073596a74 100644
--- a/plugins/GSdx/GSLinuxDialog.cpp
+++ b/plugins/GSdx/GSLinuxDialog.cpp
@@ -290,11 +290,14 @@ void populate_hw_table(GtkWidget* hw_table)
 
 	GtkWidget* paltex_check     = CreateCheckBox("Allow 8 bits textures", "paltex");
 	GtkWidget* fba_check        = CreateCheckBox("Alpha correction (FBA)", "fba", true);
+	GtkWidget* acc_blend_check  = CreateCheckBox("Accurate Blend", "accurate_blend", false);
+	GtkWidget* acc_date_check   = CreateCheckBox("Accurate Date", "accurate_date", false);
 
 	s_table_line = 0;
 	InsertWidgetInTable(hw_table, filter_label, filter_combo_box);
 	InsertWidgetInTable(hw_table, af_label, af_combo_box);
 	InsertWidgetInTable(hw_table, paltex_check, fba_check);
+	InsertWidgetInTable(hw_table, acc_blend_check, acc_date_check);
 }
 
 void populate_gl_table(GtkWidget* gl_table)
diff --git a/plugins/GSdx/GSRendererOGL.cpp b/plugins/GSdx/GSRendererOGL.cpp
index 5f3a8777cb..69b297fd8a 100644
--- a/plugins/GSdx/GSRendererOGL.cpp
+++ b/plugins/GSdx/GSRendererOGL.cpp
@@ -27,16 +27,29 @@
 GSRendererOGL::GSRendererOGL()
 	: GSRendererHW(new GSTextureCacheOGL(this))
 {
-	m_fba = !!theApp.GetConfig("fba", 1);
-	UserHacks_AlphaHack = !!theApp.GetConfig("UserHacks_AlphaHack", 0) && !!theApp.GetConfig("UserHacks", 0);
-	UserHacks_AlphaStencil = !!theApp.GetConfig("UserHacks_AlphaStencil", 0) && !!theApp.GetConfig("UserHacks", 0);
-	UserHacks_DateGL4 = !!theApp.GetConfig("UserHacks_DateGL4", 0);
+	m_fba = theApp.GetConfig("fba", 1);
 	m_pixelcenter = GSVector2(-0.5f, -0.5f);
-	UserHacks_Unscale_sprite = !!theApp.GetConfig("UserHacks", 0) ? theApp.GetConfig("UserHacks_UnscaleSprite", 0) : 0;
 
-	UserHacks_TCOffset = !!theApp.GetConfig("UserHacks", 0) ? theApp.GetConfig("UserHacks_TCOffset", 0) : 0;
-	UserHacks_TCO_x = (UserHacks_TCOffset & 0xFFFF) / -1000.0f;
-	UserHacks_TCO_y = ((UserHacks_TCOffset >> 16) & 0xFFFF) / -1000.0f;
+	m_accurate_blend  = theApp.GetConfig("accurate_blend", 0);
+	m_accurate_date   = theApp.GetConfig("accurate_date", 0);
+
+	UserHacks_AlphaHack      = theApp.GetConfig("UserHacks_AlphaHack", 0);
+	UserHacks_AlphaStencil   = theApp.GetConfig("UserHacks_AlphaStencil", 0);
+	UserHacks_DateGL4        = theApp.GetConfig("UserHacks_DateGL4", 0);
+	UserHacks_Unscale_sprite = theApp.GetConfig("UserHacks_UnscaleSprite", 0);
+	UserHacks_TCOffset       = theApp.GetConfig("UserHacks_TCOffset", 0);
+	UserHacks_TCO_x          = (UserHacks_TCOffset & 0xFFFF) / -1000.0f;
+	UserHacks_TCO_y          = ((UserHacks_TCOffset >> 16) & 0xFFFF) / -1000.0f;
+
+	if (!theApp.GetConfig("UserHacks", 0)) {
+		UserHacks_AlphaHack      = false;
+		UserHacks_AlphaStencil   = false;
+		UserHacks_DateGL4        = false;
+		UserHacks_Unscale_sprite = 0;
+		UserHacks_TCOffset       = 0;
+		UserHacks_TCO_x          = 0;
+		UserHacks_TCO_y          = 0;
+	}
 }
 
 bool GSRendererOGL::CreateDevice(GSDevice* dev)
@@ -246,7 +259,7 @@ void GSRendererOGL::DrawPrims(GSTexture* rt, GSTexture* ds, GSTextureCache::Sour
 			DATE_GL45 = true;
 			DATE = false;
 		} else if (om_csel.wa && (!context->TEST.ATE || context->TEST.ATST == ATST_ALWAYS)) {
-			DATE_GL42 = GLLoader::found_GL_ARB_shader_image_load_store && !UserHacks_AlphaStencil;
+			DATE_GL42 = m_accurate_date && GLLoader::found_GL_ARB_shader_image_load_store && !UserHacks_AlphaStencil;
 		}
 	}
 
diff --git a/plugins/GSdx/GSRendererOGL.h b/plugins/GSdx/GSRendererOGL.h
index 774aa16272..b5f60e2086 100644
--- a/plugins/GSdx/GSRendererOGL.h
+++ b/plugins/GSdx/GSRendererOGL.h
@@ -32,6 +32,9 @@ class GSRendererOGL : public GSRendererHW
 	private:
 		GSVector2 m_pixelcenter;
 		bool m_fba;
+		bool m_accurate_blend;
+		bool m_accurate_date;
+
 		bool UserHacks_AlphaHack;
 		bool UserHacks_AlphaStencil;
 		bool UserHacks_DateGL4;