Hi Pascal,
thanks for your answer.
In .theanorc I set Theano flag:

floatX = float32
device=cuda0
dnn.conv.algo_fwd =  time_once 
dnn.conv.algo_bwd_filter = time_once
dnn.conv.algo_bwd_data = time_once

Using theano.gpuarray.dnn.dnn_conv  the output is: ValueError: 
("convolution algo %s can't be used for 3d convolutions", ('small',))
Same output with float16.


If I use  theano.sandbox.cuda.dnn.dnn_conv3d  with Theano flags
floatX = float16
device=cuda0
dnn.conv.algo_fwd =  time_once 
dnn.conv.algo_bwd_filter = time_once
dnn.conv.algo_bwd_data = time_once

the output is: TypeError: CudaNdarrayType only supports dtype float32 for 
now. Tried using dtype float16 for variable None



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