After spending time to finetune my new 4090 I have a peculiar situation: I have a perfectly smooth experience with 30 fps locked with Motion Reprojection, and about +35% overhead, but I still have random scenery stuttering every several seconds. It is especially noticeable on the background of otherwise butter-smooth flight. The intervals are random - 3 to 15 seconds between stutters usually. Stutters are modest, sometimes they feel like a dropped frame, sometimes like a “rubberband” speed-up of the scenery, but generally they feel like an interruption of a smooth motion. They are not very noticeable when looking ahead, but are quite noticeable and annoying when looking to the side and flying low. I always had them on 3080, but now I’m very puzzled, as I still have them on 4090, at least in 737 in a dense area, but even in a not so dense area they are still present.
- Do you experience them too, or is my situation more or less uncommon?
- If you were able to overcome the stutters, what helped you do that?
- Are they unavoidable or is it something peculiar with my hardware?
I have Gygabite RTX 4090 Gaming OC, Ryzen 9 5900X (liquid cooled by a 360 3-fan AIO cooler), 1250W PSU, 64Gb DDR4 RAM running at 3800. Thermals are great, everytyhing runs cool. I run a mild rock-stable overclock, but when I was troubleshooting the stutters earlier I did test on stock speeds and it made no difference whatsoever. Win10, latest OpenXR runtime and OpenXR Toolkit - no scaling, FFR Quality/Wide only, 100% TAA, 100 OpenXR Developer Tool resolution, Motion Reprojection on “always on”, locked at 30 in OXRTK (tried unlocked too). 4090 gets it rock-stable in 30 fps MR (sometimes at 45 fps MR) even in 737 over Manhatten in dense clouds. My settings are mostly high, Clouds Ultra, Rolling Cache off (also run for a while with cache on a RamDrive). HAGS off, SMT off, resizeable bar enabled and verified, latest drivers. MSFS is on a fast 2Gb NVMe SSD. Beta SU11, but same problem was present in SU10. Frametimes are around 22ms CPU / 22ms GPU in a dense area.
I don’t know what else to try. It’s almost perfect but the graphic flow is disrupted by those microstutters…I thought it’s my hardware before, but now it definitely isn’t. Needless to say, Half-Life Alyx and anything else I throw at it is all perfectly smooth. Sorry for another stutter thread, but I think I’ve exhausted everything I knew that could help. Maybe I’m missing something, and the community wisdom can point me to a solution…