austere coral
I use 3x frame generation on 60fps capped sources to 180fps and am experiencing a strange issue. When my refresh rate is set to my monitor's native 240Hz, the result is as expected (60 / 180). However, when I lower my refresh rate, frame generation is lowered by the same factor. So when I cap my refresh rate to 180Hz, frame generation is lowered to 135fps (240/180 = 4/3 -> 180/(4/3) = 135fps). The same happens when I set my refresh rate to other rates like 200Hz (results in 150fps).
This only happens when performance mode is off and when I'm running the target at borderless full screen at my monitors native resolution of 2560x1440. It does not happen with smaller window sizes. This makes it seem like a performance issue, but that does not explain why it works just fine at 240Hz. In addition, my GPU utilization is also much lower when the refresh rates are lowered and I'm experiencing these weird fps caps. The Vertical Sync setting in Lossless Scaling does not affect this behavior and I am using the DXGI capture API.
Does anyone know what could be causing this? I'd like to lower my refresh rate to 180Hz when using LSFG to match the frames generated, but that locks it to 135fps when borderless full screen.
GPU: GTX 1080
CPU: i5-13600k
Monitor: Asus PG279QM
runic fox