diff --git a/concho/procs_chooser.py b/concho/procs_chooser.py
index 595f6af..523f719 100644
--- a/concho/procs_chooser.py
+++ b/concho/procs_chooser.py
@@ -54,6 +54,19 @@ def plotCpuPassmark():
     plt.show()
 
 
+def create_unique_marker(config_index):
+    marker_string=''
+    alphabet_size = 26
+    alphabel_base = 0x41
+    while True:
+        digit_index = config_index % alphabet_size
+        marker_string = chr(alphabel_base + digit_index) + marker_string
+        if config_index < alphabet_size:
+            break
+        else:
+            config_index = config_index // alphabet_size
+    return marker_string
+
 def plot_system_efficiency():
 
     cpuTable = numpy.genfromtxt('cpu_table.dat', dtype=("|U15", float, int, float, float, float), names=True, delimiter='\t')
@@ -208,21 +221,23 @@ def plot_system_efficiency():
         print('itemTotalCost', itemTotalCost[i])
         print('flops', item_flops[i])
     # print y
+    config_index = 0
     for label, x1, y1, power, speed, price, in zip(item_label, x, y, item_power_consumption, item_speed, item_price):
         print(label, x1, y1)
         if y1 > 0.0001:
             color = getColorCodeFromItemLabel(label)
             # marker = markersCycler.next()
-            marker = get_marker_from_label( label )
+            # marker = get_marker_from_label( label )
             #print(x1, y1)
             short_label = label.replace('dell-poweredge-','').replace('intel-xeon-','')
-            plt.scatter( x1, y1, facecolors=color, s=markerSize, marker=marker[0], label=short_label)
-            if y1 > 5.0e16:
+            plt.scatter( x1, y1, facecolors=color, s=(markerSize * len(create_unique_marker(config_index))) , marker='$\mathrm{%s}$' % create_unique_marker(config_index), label=short_label)
+            if False: # y1 > 5.0e16:
                 plt.annotate( u'%s' % short_label, 
                     xy = (x1, y1), xytext = (x1*4.0, (y1-5.2e16)*7.1),
                     textcoords = 'data', ha = 'right', va = 'bottom',
                     bbox = dict(boxstyle = 'round,pad=0.5', fc = 'yellow', alpha = 0.5),
                     arrowprops = dict(arrowstyle = '->', connectionstyle = 'arc3,rad=0'))
+            config_index += 1
 
     plt.xlabel(u'purchase price [€]')
     plt.ylabel(u'num total DP operations/total cost [€/^-1]')