I'll start off with specs:
Lenovo Y710 Cube
Core i7 6700
16GB DDR-2400 RAM
GTX 1070 Founders (non-OC for now + latest drivers)
Samsung 850 EVO for VR library
So when I say performance issues are suddenly occurring I mean that I was not noticing any frame drops earlier this week when I first received and starting using my Rift S, however since a couple of days ago I'm seeing regular drops in frames in every game in my Oculus library. This includes Beat Saber, Superhot VR, Space Pirate Trainer, Lucky's Tale (all from Oculus, no SteamVR). I have installed Oculus Tray Tool and enabled the overlay for performance and I am seeing extremely low headroom and constant drops from 80fps down to either the low 70's or 40's (AWS I presume?). This is with native settings for every game, I've made no custom profiles and configured no supersampling. All the while these drops are happening my CPU and GPU usage is well below 50% with temperatures around the 40-45C range, so not thermal throttling.
I do realize my system is not top of the line, but I'm above recommended specs and as I said I was not noticing these issues at first. Hoping someone here may have experienced something similar and perhaps found a solution? Or some tips and things to look out for? I have re-formatted Windows and installed fresh drivers just rule out any software or drivers installed I may not have been aware of.
Appreciate any help, next step will be formally opening a support case.. Just thought I'd give this a go first.