I can dual boot and I installed NMS on both drives.

W10 is on an SSD drive, while Win7 is on a traditional mechanic drive.

I have noticed a difference in framerate , W7 seems to be winning,
when it comes to running the game smoothly. I can crank to max settings
and still get a very good framerate. On Win 10, the framerate is still good, but I get hickups even on medium settings.
My rig:
i5 Haswell + 960 GTX *(4GB)+ 32GB RAM

i know w10 sux donkeys ass w7 is the best but yeah still cant run no man's donkey need patch now!!!!!

ohh and i heve Sapphire Radeon R9 380 4GB Nitro it hes opennuke 4.5 all updated still can't run the dam game

I'm also dual booting W10 and W7 i5, GTX 970, 16gb.
Any differences in frame rates between the two OS's is negligible.
If you are seeing drastic differences, odds are one of your OS installs in not optimized.

BTW in most scenarios I'm getting around 45 - 135 fps. Just an observation as I have no real way of averaging real-time frame rates.

w10 sucks mostly for the spy garbage... not so bad if you have firewall for lan though you can block it.

settings make no difference... it's not a windows 10 problem, but most likely the SSD; as many people have complained about in more prominent places.

i never use ssd ohh man never i use sas drives that stuff rocks super fast 20 drives in raid 10 in striped works for me ohh i can set it to jbod but what to do with 20 lose drives ohh well ill leave it raid 10 striped

The SSD drive may be causing the problem?

You urbull check this out; straight up RAID 0, 40 drives and I've got that 2.5gb NMS install spread out in 62.5 mb chunks across my array. Still getting hitching bro. What do?

There are suggestions that moving your game to a HDD 'helps'; however, there were also suggestions that moving your game to an SSD helps.

To argue with myself, I'd say none of them make a difference between each other.

There are also Windows 10 users here that have had fine experiences with the game, so saying it's OS related isn't right. As I've mentioned before, the game is just temperamental thanks to the shader caching method (that's totally replaced in the new patches). Sometimes my game is great, and sometimes when I start up again it runs like a total mess. We need this friggen patch already.

what is urbull tell me ohh this raid is what i use and thats it problems with it call the CIA

Windows 7 has less overhead. It doesn't spend as much of your hardware's resources spying on your usage metrics and other nonsensical wastes of CPU, RAM, and disk time. It's not an opinion; this is fact.

I was suspecting it, since in windows 7, I disable almost all startup programs from the get-go
while I'm worried to mess too much in W10.