I have a 4090, 13900k and Aero. And I’m in the beta testing group for varjo on their Base software. One thing that was reported recently with the 12th and 13th gen intel processors was very short stutters every so often and it was traced to varjo base running on both the p cores and e cores of the 12th/13th gen intel whereas MSFS runs primarily on p cores. And e cores have slightly slower clock speeds of course. Our beta testing group figured out that by putting varjo base only on p cores that we were able to eliminate stutters. I believe that fix in varjo base is coming in the next release from varjo, but in the meantime one thing you can try is to disable e cores on your bios, or better yet leave them running as they handle tasks of course, but force varjo base to only run on p cores. You can do that using a software tool called process lasso. It’s a complicated tool and sort of an expert user thing as it can cause problems for some software if you override the Windows process scheduler. However, for varjo base it works great and I have been using it for like a month now and the user manual is great (I’m not an expert or even a software programmer type, just a normal sim user who likes tweaking things on the pc). I also force other things over to e cores like background monitoring tools to free up maximum p core cpu for. MSFS and varjo. But don’t mess with MSFS as that uses both p cores and e cores and it won’t boot if you change how it uses cores. I bought the software for $30 but there is a free version I think. The function in that tool to use is called “cpu affinity” and for any running program you can easily just pick the cpu cores for it to run on. Give this a try and see if helps you.
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