[Python] tensorflow GPU is not available

I followed through Jeff Heaton's youtube video to install tensorflow with GPU. I have Eva nivida GTX 1660 Ti. After that, it show GPU is not available. any suggestion if something goes wrong? Thanks

https://www.youtube.com/watch?v=PnK1jO2kXOQ&list=PLrx-l85_irc5IQhZ-yOLq6NjV7GajbT0h&index=8&t=86s https://github.com/jeffheaton/t81_5...ter/install/tensorflow-install-jul-2020.ipynb

# What version of Python do you have?
# What version of Python do you have?
import sys

import tensorflow.keras
import pandas as pd
import sklearn as sk
import tensorflow as tf

print(f"Tensor Flow Version: {tf.__version__}")
print(f"Keras Version: {tensorflow.keras.__version__}")
print()
print(f"Python {sys.version}")
print(f"Pandas {pd.__version__}")
print(f"Scikit-Learn {sk.__version__}")
gpu = len(tf.config.list_physical_devices('GPU'))>0
print("GPU is", "available" if gpu else "NOT AVAILABLE")


Tensor Flow Version: 2.3.0
Keras Version: 2.4.0

Python 3.8.5 (default, Sep 3 2020, 21:29:08) [MSC v.1916 64 bit (AMD64)]
Pandas 1.2.0
Scikit-Learn 0.23.2
GPU is NOT AVAILABLE

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