title: Choiche GPU tensorflow-directml or multi-gpu
body: <p>I'm training a model with tensorflow on a Windows PC, but the training is low so I'm trying to configure tensorflow to use a GPU.
  I installed tensorflow-directml (in a conda environment with python 3.6) because my GPU is an AMD Radeon GPU.
  With this simple code</p>
  <pre><code>import tensorflow as tf
  tf.test.is_gpu_available()
  </code></pre>
  <p>I receive this ouput</p>
  <blockquote>
  <p>2021-05-14 11:02:30.113880: I
  tensorflow/core/platform/cpu_feature_guard.cc:142] Your CPU supports
  instructions that this TensorFlow binary was not compiled to use: AVX2
  2021-05-14 11:02:30.121580: I
  tensorflow/stream_executor/platform/default/dso_loader.cc:99]
  Successfully opened dynamic library
  C:\Users\v.rocca\anaconda3\envs\tfradeon\lib\site-packages\tensorflow_core\python/directml.adbd007a01a52364381a1c71ebb6fa1b2389c88d.dll
  2021-05-14 11:02:30.765470: I
  tensorflow/core/common_runtime/dml/dml_device_cache.cc:249] DirectML
  device enumeration: found 2 compatible adapters. 2021-05-14
  11:02:30.984834: I
  tensorflow/core/common_runtime/dml/dml_device_cache.cc:185] DirectML:
  creating device on adapter 0 (Radeon (TM) 530) 2021-05-14
  11:02:31.150992: I
  tensorflow/stream_executor/platform/default/dso_loader.cc:99]
  Successfully opened dynamic library Kernel32.dll 2021-05-14
  11:02:31.174716: I
  tensorflow/core/common_runtime/dml/dml_device_cache.cc:185] DirectML:
  creating device on adapter 1 (Intel(R) UHD Graphics 620) True</p>
  </blockquote>
  <p>So tensorflow get the integrated GPU Intel instead the Radeon GPU.
  If I disable the Intel GPU from the Manage Hardware I receive in the output the correct GPU</p>
  <blockquote>
  <p>2021-05-14 10:47:09.171568: I
  tensorflow/core/platform/cpu_feature_guard.cc:142] Your CPU supports
  instructions that this TensorFlow binary was not compiled to use: AVX2
  2021-05-14 10:47:09.176828: I
  tensorflow/stream_executor/platform/default/dso_loader.cc:99]
  Successfully opened dynamic library
  C:\Users\v.rocca\anaconda3\envs\tfradeon\lib\site-packages\tensorflow_core\python/directml.adbd007a01a52364381a1c71ebb6fa1b2389c88d.dll
  2021-05-14 10:47:09.421265: I
  tensorflow/core/common_runtime/dml/dml_device_cache.cc:249] DirectML
  device enumeration: found 1 compatible adapters. 2021-05-14
  10:47:09.626567: I
  tensorflow/core/common_runtime/dml/dml_device_cache.cc:185] DirectML:
  creating device on adapter 0 (Radeon (TM) 530)</p>
  </blockquote>
  <p>I don't want to disable the Intel GPU every time so this is my question.
  Is it possible to choice which GPU I want to use? Or Is it possible to use both GPUs?
  Thanks</p>