All 660's should be fine. Generally any Nvidia GPU released before 2015 tends to be 100% okay (though I assume there's outliers both among us and the cards)
General rule of thumb for a comfy system barring whatever monitor works for you seems to be; Windows 7 > Pre 2015 Nvidia GPU > Pre 36x.xx driver (though there was a couple bad before that)
I'd give the other 660s a long run if I were you and see if it's not just your brain being like "MAYBE" (I've had this enough times myself)
Windows 10 seems to add in a lot of problems for people too. There doesn't seem to be much data anecdotal or otherwise for Windows 8.1 but I believe that it will more likely be okay than 10 in general.
As a side I'm hoping the 20xx series sorts whatever issue most of us have with newer cards but since the 710 (a 2016 release), second revision of the GTX 750 (late 2015) and most of the 9 series especially the later GPU's (960, 950) and later revisions of known okay cards seem to give people trouble I'm not holding my breath.
Also does anybody know at what point AMD started to cause people strain?