I thought you might be interested in looking at Nvidia 660 vs 870M - Performance Troubleshooting.
https://forums.dayz.com/topic/222519-nvidia-660-vs-870m-performance-troubleshooting/?do=findComment&comment=2235084
× Pasted as rich text. Restore formatting
Only 75 emoji are allowed.
× Your link has been automatically embedded. Display as a link instead
× Your previous content has been restored. Clear editor
× You cannot paste images directly. Upload or insert images from URL.