When I purchased my CV1, I also splashed out on a mega PC / Nvidia 1080 Upgrade. For over a year I have had no issues with this PC / Rift combo.
Over the weekend I dug out my old PC / Nvidia 980 which had been gathering dust. I wiped the hard drive, re-installed W10, latest Nvidia drivers and stuck on the Rift software. It all works fine but when I jumped into VR I was surprised to find that the rift has a terrible bright washed out image with the worst god rays you can imagine!!!!
Obviously plugging the rift back into the 1080 the display looks fine again.
So I have two PC's, both running the same Nvidia driver, both using the same headset... however one has a much worse VR display experience than the other. The rift on the 980 looks like the brightness is turned up way too high. This would explain why some uses have a really poor experience and natrually blame the rift?
To be honest I am not sure how to fix my 980. I tried using a 3 month old Nvidia driver (clean install) but this makes no difference. The OS is a basic Win 10 image with just the relevent mobo drivers. I have no other software install except the Oculus software. The nvidia panel doesn't give any options to adjust the settings on the rift either.
Any ideas what I can change on this basic PC build that will darken the Oculus output?