There are many optimizations to try (switching power mode to adaptive instead of optimal in the driver or using ordered dithering, lowering chroma upscaling to NGU medium if you're using a higher setting, increasing or decreasing the queue sizes, etc) that might allow you to not compromise on other things. If you are using UHD BD menus, it means you're using copyback or software decoding, you're also losing perf (compared to using D3D11 native) or relying on your CPU to do this. You could try to look at your load for the CPU / GPU during playback and see if there is a bottleneck.For refresh rate, that's easy to solve, you just need to install the latest CRU (at least 1.4.1, older versions won't work) and create a custom resolution. I attach the one I've created, you only have to import it in CRU and then select the PC UHD custom resolution. It will say 24p, but it's 23p really and I have no dropped frames for hours, if not days, although jRiver takes a while before updating the "time between frame drop" info. For some reason it starts with a small value, but there is no drop.Good luck!
Thanks, I was able to load your custom resolution in CRU. It eliminated both dropped and repeated frames (after 2 or 3 seconds).I have two remaining issues to tackle regarding dropped/repeated frames:- I get both dropped and repeated frames for 2-3 seconds when starting playback, skipping chapters, and when resuming playback after a pause. Then no dropped/repeated frames for the remainder of the movie.- I still need to compromise performance for chroma channels or I get dropped frames; even though rendering times dropped to 38 ms without the compromise after loading your custom resolution.I will keep on tinkering.