GPU-Utils is low 1%

[lonelydancer]

Describe the bug

run the example in Get Started in 60 Seconds

Context

• OS Ubuntu18.04
• Hardware Tesla 80k, cuda 10.1,cudnn7.0
• matchzoo 2.2.0, tensorflow2.2.0, keras2.3.0

Additional Information

Other things you want the developers to know.