• We should now be fully online following an overnight outage. Apologies for any inconvenience, we do not expect there to be any further issues.

Why does using DSR result in screen tearing in id Tech 6 games?

Jul 24, 2017
93
25
61
I've noticed this in both Wolfenstein 2 and Doom 2016, but no other games. I have a Vizio E-series 43" 1080p TV I'm trying to play on with this rig:

Ryzen 7 1700 @ 3.8 Ghz
GTX 1080 @ 2050Mhz
16GB DDR4-3000 (2933)
both games installed on a WD Blue 5400rpm HDD

With native resolution, both of these games work fine. However, if I enable DSR with 4.0 scaling in the Nvidia control panel, I get a horizontal tear about 1/4 up from the bottom of the screen - even if traditional double-buffered Vsync is on.

This happens even if I set the settings to lowest to ensure that the GPU has a lot of headroom to hit a consistent vsynced 60 fps, and it also happens if I use 2.25 instead of 4 as the DSR factor.

This isn't really a big deal, I just thought it was an odd problem and wondered if anybody knew what was going on.