Recently experienced loss of prior exquisitely low frame time variance so cleared out most from the Comm Folder and things appeared much better at TO from KATL (PMDG 738) and this is what I saw a moment ago in the context of decent smoothness:

Of note, I have AI traffic OFF, and do have GSX still in the Comm Folder, and no FSLTL.  I also have REX AccuSeason out of the Comm Folder.   Don't have Steam running in the background.  Previously had proven GFE had no negative impact on this so it's still on.  The only changes I'm aware of:  SU12, an updated of RealTek Audio Console (which I deleted), and Win 10 update over 10d ago so no can reverse.

After a pleasant exit out of KATL from gate to 18000ft w/ FTV <2ms at 99.6% or so and very smooth, w/ the fix interval spikes but under the awareness radar, then this horror upon final into nothing burger KROA.  Important:  GPU/CPU/VRAM all have tons of headroom (due to my frame lock).  At KSEA the other day and another landing on a short flight, really nasty stutters to the point I could hardly land the plane.  

I know this is a near duplicate entry from another thread but hoping to get more visibility w/ this post.  I'm stumped, and have no idea if others are seeing this change recently or not so much.  I'll be OOT for 3 weeks so by miracles perhaps something w/ change on the MSFS side.  I've updated all planes I use and this also happens w/ FBW 320NX, but PMDG 738 has been the performance champ so used this for this test.

 

I have an I9 13900k and an RTX 4090 and I also suffer from occasional major stutters even with no live traffic. Most of time everything works great and I have not been able to reproduce this stuttering fest where it happened before. Same place one day and all is fine…another day slide show and VR headset goes blank for a second or two. It seems that the location is irrelevant,

Anyway, I’m not helping and just letting you know you are not alone with this issue. For my part, I have given up trying to figure out what else to do. I’m just waiting for SU 13 and hoping for a miracle 😁

Thanks, it's helpful to know I'm not alone as it kind of points to MSFS and its streaming service as being the more likely common denominator.  It's generally a bad idea to troubleshoot your way out of these kinds of sudden onset w/ no explantion troubles but OTOH it's hard to choke it down!  And I too have had that scenario where one day it's totally fluid and the same scenario it's a really bad mess, and some in between.  WAS NOT this way prior to SU12 for me.  Do we know when SU13 might arrive?  

I am having the same issues with su12.

mike

Guess Heaven and Hell are close to each other.

I am having an absolute blast here on my system. 60FPS and not the slightest of stutter. 4k resolution, everything on ultra. TLOD @ 250, FSLTL at standard settings. Grass and bushes removed because is dont need em.