diff --git a/include_CLANG.mk b/include_CLANG.mk
index ac33f16..fb69d21 100644
--- a/include_CLANG.mk
+++ b/include_CLANG.mk
@@ -7,6 +7,7 @@ ANSI_CFLAGS += -pedantic
 ANSI_CFLAGS += -Wextra
 
 CFLAGS   = -Ofast -march=native $(ANSI_CFLAGS) #-Xpreprocessor -fopenmp -g
+#CFLAGS   = -Ofast -march=core-avx2 $(ANSI_CFLAGS) #-Xpreprocessor -fopenmp -g
 #CFLAGS   = -O3 -march=cascadelake $(ANSI_CFLAGS) #-Xpreprocessor -fopenmp -g
 #CFLAGS   = -Ofast $(ANSI_CFLAGS) -g #-Xpreprocessor -fopenmp -g
 ASFLAGS  = -masm=intel
diff --git a/include_ICC.mk b/include_ICC.mk
index 02d1597..6e711d1 100644
--- a/include_ICC.mk
+++ b/include_ICC.mk
@@ -10,6 +10,7 @@ OPTS      = -Ofast -xCORE-AVX512 -qopt-zmm-usage=high $(PROFILE)
 #OPTS     = -Ofast -xSSE4.2 $(PROFILE)
 #OPTS     = -Ofast -no-vec $(PROFILE)
 #OPTS     = -Ofast -xHost $(PROFILE)
+#OPTS     = -Ofast -march=core-avx2 $(PROFILE)
 CFLAGS   = $(PROFILE) -restrict $(OPENMP) $(OPTS)
 ASFLAGS  = #-masm=intel
 LFLAGS   = $(PROFILE) $(OPTS) $(OPENMP)
diff --git a/include_ICX.mk b/include_ICX.mk
index ca45ee7..94b3cc8 100644
--- a/include_ICX.mk
+++ b/include_ICX.mk
@@ -11,6 +11,7 @@ OPTS      = -Ofast -xCORE-AVX512 -qopt-zmm-usage=high $(PROFILE)
 #OPTS     = -Ofast -xSSE4.2 $(PROFILE)
 #OPTS     = -Ofast -no-vec $(PROFILE)
 #OPTS     = -Ofast -xHost $(PROFILE)
+#OPTS     = -Ofast -march=core-avx2 $(PROFILE)
 CFLAGS   = $(PROFILE) $(OPENMP) $(OPTS)
 ASFLAGS  = #-masm=intel
 LFLAGS   = $(PROFILE) $(OPTS) $(OPENMP)