Custom Resolution Utility (CRU)

[steve]

(12-05-2019 03:24 PM)ToastyX Wrote:  

(12-05-2019 06:12 AM)steve Wrote:  I have a FreeSync monitor with an advertised range of 48-144hz. The range limit meta-data in CRU confirms this is the case.

I am trying to use this monitor in g-sync compatible mode on an Nvidia RTX 2070. Overall it works okay, but I noticed some brightness flickering at the 60fps threshold. A little bit of troubleshooting with the OSD frame-rate display leads me to believe that the Nvidia driver is enabling LFC at 60hz/fps, and not at 48hz. This causes the monitor to oscillate between 60hz && 120hz, and presumably the panel brightness is quite a bit different between those frequencies.

What about using 120 Hz instead of 144 Hz? Then LFC should activate at 50 Hz instead. CRU doesn't have a way to control how NVIDIA handles LFC.

Just tried and it still seems to toggle into LFC at 60hz in the pendulum demo regardless of 120 vs 144. It doesn't want to go below the 60hz threshold for some reason.

I really appreciate your validation that CRU can't control NVIDIA's LFC implementation. I've been pulling my hair out thinking I've been doing something wrong because I've seen a couple forum posts where people suggested they could manipulate G-SYNC LFC by changing the FreeSync range. Here for example.