diff --git a/test/run_benchmarks.py b/test/run_benchmarks.py
index 3c4eaae..ad01ee5 100755
--- a/test/run_benchmarks.py
+++ b/test/run_benchmarks.py
@@ -230,9 +230,12 @@ class ResultsSummary:
     def __init__(self, run_data, plots_dir='plots'):
         self.plots_dir = plots_dir
 
-        # filter out failures
-        self.failed_configs = [data.config for data in run_data if data.result is None]
-        run_data = [data for data in run_data if data.result is not None]
+        # because .sdram_controller_data_width may fail for unimplemented modules
+        def except_none(func):
+            try:
+                return func()
+            except:
+                return None
 
         # gather results into tabular data
         column_mappings = {
@@ -246,14 +249,14 @@ class ResultsSummary:
             'bist_random':      lambda d: getattr(d.config.access_pattern, 'bist_random', None),
             'pattern_file':     lambda d: getattr(d.config.access_pattern, 'pattern_file', None),
             'length':           lambda d: d.config.length,
-            'generator_ticks':  lambda d: d.result.generator_ticks,
-            'checker_errors':   lambda d: d.result.checker_errors,
-            'checker_ticks':    lambda d: d.result.checker_ticks,
-            'ctrl_data_width':  lambda d: d.config.sdram_controller_data_width,
+            'generator_ticks':  lambda d: getattr(d.result, 'generator_ticks', None),  # None means benchmark failure
+            'checker_errors':   lambda d: getattr(d.result, 'checker_errors', None),
+            'checker_ticks':    lambda d: getattr(d.result, 'checker_ticks', None),
+            'ctrl_data_width':  lambda d: except_none(lambda: d.config.sdram_controller_data_width),
             'clk_freq':         lambda d: d.config.sdram_clk_freq,
         }
         columns = {name: [mapping(data) for data in run_data] for name, mapping, in column_mappings.items()}
-        self.df = df = pd.DataFrame(columns)
+        self._df = df = pd.DataFrame(columns)
 
         # replace None with NaN
         df.fillna(value=np.nan, inplace=True)
@@ -300,6 +303,16 @@ class ResultsSummary:
             'read_latency':     ScalarFormatter(),
         }
 
+    def df(self, ok=True, failures=False):
+        is_failure = lambda df: pd.isna(df['generator_ticks']) | pd.isna(df['checker_ticks']) | pd.isna(df['checker_errors'])
+        df = self._df
+        if not ok:  # remove ok
+            is_ok = ~is_failure(df)
+            df = df[~is_ok]
+        if not failures:  # remove failures
+            df = df[~is_failure(df)]
+        return df
+
     def header(self, text):
         return '===> {}'.format(text)
 
@@ -309,9 +322,9 @@ class ResultsSummary:
             print(self.header(title + ':'))
             print(df)
 
-    def get_summary(self, mask=None, columns=None, column_formatting=None, sort_kwargs=None):
+    def get_summary(self, df, mask=None, columns=None, column_formatting=None, sort_kwargs=None):
         # work on a copy
-        df = self.df.copy()
+        df = df.copy()
 
         if sort_kwargs is not None:
             df = df.sort_values(**sort_kwargs)
@@ -360,7 +373,7 @@ class ResultsSummary:
             ))
 
     def groupped_results(self, formatters=None):
-        df = self.df
+        df = self.df()
 
         if formatters is None:
             formatters = self.text_formatters
@@ -368,27 +381,32 @@ class ResultsSummary:
         common_columns = ['name', 'sdram_module', 'sdram_data_width', 'bist_alternating', 'num_generators', 'num_checkers']
         latency_columns = ['write_latency', 'read_latency']
         performance_columns = ['write_bandwidth', 'read_bandwidth', 'write_efficiency', 'read_efficiency']
+        failure_columns = ['bist_length', 'bist_random', 'pattern_file', 'length', 'generator_ticks', 'checker_errors', 'checker_ticks']
 
-        yield 'Latency', self.get_summary(
+        yield 'Latency', self.get_summary(df,
             mask=df['is_latency'] == True,
             columns=common_columns + latency_columns,
             column_formatting=formatters,
         )
-        yield 'Custom access pattern', self.get_summary(
+        yield 'Custom access pattern', self.get_summary(df,
             mask=(df['is_latency'] == False) & (~pd.isna(df['pattern_file'])),
             columns=common_columns + ['length', 'pattern_file'] + performance_columns,
             column_formatting=formatters,
         ),
-        yield 'Sequential access pattern', self.get_summary(
+        yield 'Sequential access pattern', self.get_summary(df,
             mask=(df['is_latency'] == False) & (pd.isna(df['pattern_file'])) & (df['bist_random'] == False),
             columns=common_columns + ['bist_length'] + performance_columns, # could be length
             column_formatting=formatters,
         ),
-        yield 'Random access pattern', self.get_summary(
+        yield 'Random access pattern', self.get_summary(df,
             mask=(df['is_latency'] == False) & (pd.isna(df['pattern_file'])) & (df['bist_random'] == True),
             columns=common_columns + ['bist_length'] + performance_columns,
             column_formatting=formatters,
         ),
+        yield 'Failures', self.get_summary(self.df(ok=False, failures=True),
+            columns=common_columns + failure_columns,
+            column_formatting=None,
+        ),
 
     def plot_summary(self, plots_dir='plots', backend='Agg', theme='default', save_format='png', **savefig_kw):
         matplotlib.use(backend)
@@ -441,14 +459,6 @@ class ResultsSummary:
 
         return axis
 
-    def failures_summary(self):
-        if len(self.failed_configs) > 0:
-            print(self.header('Failures:'))
-            for config in self.failed_configs:
-                print('  {}: {}'.format(config.name, config.as_args()))
-        else:
-            print(self.header('All benchmarks ok.'))
-
 # Run ----------------------------------------------------------------------------------------------
 
 class RunCache(list):
@@ -618,7 +628,6 @@ def main(argv=None):
     if _summary:
         summary = ResultsSummary(run_data)
         summary.text_summary()
-        summary.failures_summary()
         if args.html:
             summary.html_summary(args.html_output_dir)
         if args.plot: