diff --git a/tutorial-contents/502_GPU.py b/tutorial-contents/502_GPU.py
index 9403ab3..ba1c0dc 100644
--- a/tutorial-contents/502_GPU.py
+++ b/tutorial-contents/502_GPU.py
@@ -69,7 +69,7 @@ for epoch in range(EPOCH):
             test_output = cnn(test_x)
 
             # !!!!!!!! Change in here !!!!!!!!! #
-            pred_y = torch.max(test_output, 1)[1].cuda().data.squeeze()  # Move to CPU
+            pred_y = torch.max(test_output, 1)[1].cuda().data.squeeze()  # move the computation in GPU
 
             accuracy = sum(pred_y == test_y) / test_y.size(0)
             print('Epoch: ', epoch, '| train loss: %.4f' % loss.data[0], '| test accuracy: %.2f' % accuracy)
@@ -78,7 +78,7 @@ for epoch in range(EPOCH):
 test_output = cnn(test_x[:10])
 
 # !!!!!!!! Change in here !!!!!!!!! #
-pred_y = torch.max(test_output, 1)[1].cuda().data.squeeze()  # Move to CPU
+pred_y = torch.max(test_output, 1)[1].cuda().data.squeeze() # move the computation in GPU
 
 print(pred_y, 'prediction number')
 print(test_y[:10], 'real number')