To fix , you must address what is commonly known as a "CPU Bottleneck". This happens when your processor (CPU) is maxed out and cannot feed data to your graphics card (GPU) fast enough to keep it busy. Immediate Software Optimizations
The most effective way to rebalance usage without hardware changes is through Windows and driver tweaks. How To FIX Low GPU Usage and High CPU Usage in ...
: Windows may be throttling your CPU to save power. Go to Control Panel > Power Options and select High Performance or Ultimate Performance . To fix , you must address what is