It seems that GPU usage in UE5 has dramatically increased in comparison to 4.26. A simple First Person Template with a Landscape created with default settings and a few hills sculpted onto it, causes the GPU usage to climb to the 90-99% range in UE5. In 4.26, a similar scene has the GPU usage at around 40-50%.
This was tested with an Nvidia RTX 2080 Super. I would expect the GPU usage to increase, considering that the system requirements have increased, but maxing out the GPU of a relatively high end graphics card in such a simple scene seems like it might be unintended.
The GPU usage is in the high 90s
GPU usage wouldn't be so dramatic increased in comparison to 4.26
There's no existing public thread on this issue, so head over to AnswerHub just mention UE-120212 in the post.