So, after a 9 month break I've found a little time to pop back on. I've noticed my FPS has tanked and I'm seeing dips in the low 60-70s in team fights. Previously I could cap and hold my 142 frame limiter. Added to that I'm seeing frequent crashes 'Rendering Device Missing' and the like.
I've lowered some settings too no avail. The only real change is an updated nVidia driver and (enforced) Windows 10 update. I've ensured Windows 10 Game DVR is off and Fullscreen optimisation is off for Overwatch Nay good. I've disabled any/all overlay software elements.
I'm on a 4.6GHz 4770k over clock and a 980Ti Classified at 1.5GHz under water. Heat isn't an issue.
Is there something I'm missing or has the game just been updated to be significantly more resource demanding as of late?
Check your render scale, sometimes after updates it's on 150% or something randomly.