deepflame Ok so my new CPU/Mobo is i5 8400 on ASUS h310M-E. GPU is the old one, 960GTX which was always great for me on Win 7. And the screen is the same, AOC e2051Sn, so, the only thing that could be problematic was switching to Win 10, and it didn't matter.
Most games didnt work with DX12, so I had to update to the latest 1809 build. As I said, still no problems, nothing changed. I dont really remember, maybe it was less bright before (not sure), but I'm using Nvidia profile anyway with contrast down to 2% and gamma at 0.86 -ish. Overall Win 10 seemed brighter to me than Win 7 so I decided to lower it just in case, im sure it wont be a problem even if I dont (other than my eyes getting bombarded by bright lights ofc 😃). The 1511 build I got is pirated, got it from PTB or somewhere similar. If you wanna take the risk, those builds are easy to find. I dont know if links are allowed here, especially to pirated software, if they are I can link you to the exact release, I'll just have to find it.
And for reference, the setup that I changed was i5 3330 on ASUS p8h61-m lx3 r2.0. Which was also fine. Not that I believe CPU/MB has anything to do with eye strain, but just saying in case someone needs to know.