This may or may not help anywhere but I saw this posted over at nvidia reddit
https://nvidia.custhelp.com/app/answers/detail/a_id/5157/~/after-updating-to-nvidia-game-ready-driver-461.09-or-newer%2C-some-desktop-apps
Hi, this mod package does nothing to affect visibility range, that is separate and performed via the graphics.lua/terrainoptions41.lua files, none of which are included in this mod.
This driver also has the first signs of Resize BAR support as seen in this post, just need the VBIOS now
https://forums.guru3d.com/threads/geforce-461-40-whql-drivers-download-discussion.436432/page-2#post-5881482
On the other hand I know a friend who has a G2 that recently applied this PreallocateVirtualMonitors adjustment and gained a decent framerate increase, that's the nature of PCs not all are the same.
This might help out
edit: MS source https://docs.microsoft.com/en-us/windows/mixed-reality/enthusiast-guide/using-microsoft-edge#monitor-and-input-handling-issues
Noteworthy for the supposed fix:
[Steam VR game]: Stuttering and lagging occur upon launching a game (Without using any Hardware monitoring tool). [3152190]
https://nvidia.custhelp.com/app/answers/detail/a_id/5152
My guessing is that DCS 2.7.0 will utilise features such as WDDM2.7 or greater and graphics features that just aren't available on the now very aged Windows 7 platform, you only have to look at the newer graphics that have been previewed lately to see this.