diff --git a/leonardo_booster.sh b/leonardo_booster.sh
index 11c8ba6f45c3b3be28f1f4725de14d99719b761a..aef5b968cd7a19140fb959352b0d63d61168be0c 100644
--- a/leonardo_booster.sh
+++ b/leonardo_booster.sh
@@ -35,7 +35,8 @@ for ppl in "${PPL[@]}" ; do # loop over particles per leaf
                     fi
                     export CC=nvc++
                     export HW_FLAGS='-mp=gpu -gpu=rdc,managed -gpu=cc80  -Minfo=mp,accel -Minline=1000 -O3'
-                    export OMP_NUM_THREADS=4 # gpu always uses 4 threads
+                    # gpu always uses 32 cpu cores but actually doesnt 
+                    export OMP_NUM_THREADS=32 change much
                     threads=$(python -c "print(int($N//100))") #for the text hilight: "
                 fi
                 # run thre tree build