numpy.vstack Memory Error

[michaelcheah]

Traceback (most recent call last):
  File "pretrain.py", line 31, in <module>
    model.fit(augmented, 3)
  File "/home/michael_cmx/Desktop/BetaGo-master/Model/Model.py", line 84, in fit
    boards = np.vstack(tuple(boards))
  File "/home/michael_cmx/tensorflow/lib/python3.6/site-packages/numpy/core/shape_base.py", line 234, in vstack
    return _nx.concatenate([atleast_2d(_m) for _m in tup], 0)
MemoryError

Getting memory error with numpy.vstack trying to run pretrain.py for 75 data sets of 100 games each, with total size of 291.2MB