OK need help, actually I recommeded RX5700XT saphire OC SE to friend that has been sceptical to AMD so far, wanted to convice him as I have the same card and works as charm for me.
GIGABYTE B150M-HD3 DDR3
The issue is low GPU usage during gaming. Need advise, what might be the cause. Silly comments please put them aside, I need help with troubleshooting.
did he had the Nvidia driver still installed when he installed the AMD driver?
best is to re-install windows in this case!
This is one of the common issues with Radeon RX 5000 series, you can check below other thread that posted same issue.