I have the same issue that I already filed in the closed beta. Today I got a response in Zendesk that the problem was forwarded to the dev team and now more info is requested. Obviously that time I did not have the FPS tool…so I will now add all this information.
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tested 446.14 , 27 may. Now testing earlier and june/july verisons and we will see
Oh please let it be a driver, we should be so lucky. Also add to the mix that it also seems to depend on the day/time. A couple of days ago I was flying a standard route and it was fine, a couple of drops to 22 from 30 fps no biggie CPU average 75. Today same route same settings, horrible CPU saturated for long periods fps dropping to 1.
Somebody’s got to get this sorted out.
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EDIT: Driver swap between the latest and 446.14 did not make any significant difference in other regimes of flight and taxi. All the same.
Specs:
I74770k 4GHz
1080 TI
32 GB ram
Glad i could help, i was troubleshooting today more than 12 hours to find something that can make it more enjoyable 
I don’t get plenty of stutters. It’s pretty smooth, but from time to time when flying real low over something that is heavy to load i get a jerk, but just one. I don’t get the constant stutters that FSX used to have.
I believe that you running at 1080p, and him running at 1440p, probably has a lot to do with the difference in frame rate.
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I read that the Nvidia driver 452.06 causes problems. If this can help…
Google “GeForce 452.06 Game Ready Driver Feedback Thread (Released 8/17/20)”
Actually not only I can tell the difference, but anything below 50 fps in fast moving panning scenes makes them look like a slideshow to me. The Formula 1 official stream is at only 25 FPS, and I hate it.
And I can still feel benefits up to around 90 FPS. Some people are so sensitive that they can even tell the difference between 120 FPS and 240 FPS. And depending on the contrast, movements can even be noticeable even at up 500 FPS, by some people, like fighter pilots and Formula 1 drivers.
What you need to understand is that our eyes have two types of receptors. The ones on the center, where we have the best resolution, don’t need much FPS. And for those something around 50 FPS is probably fine. And we also have the peripheral vision, which has less resolution and accuracy, but which evolved to be extremely sensitive to fast movements, so it’s extremely sensitive to FPS. We evolved that way so that the peripheral vision would allow us to react as fast as possible to any movements, which could indicate we might be attacked from the sides.
I stay very close to a large wide screen monitor. So a large part of the screen is in my peripheral vision, meaning low FPS is extremely easily noticeable for me.
Make this experiment, look at some LED that flickers, directly. It won’t bother you much. But then look at it from the corner of the eye. It will become extremely annoying.
That also explains my problem with the Formula 1 official stream. I have a very large TV, and I stay quite close to it, so a lot of the image is in my peripheral vision.
My current target is to get 50-60 FPS on average, but I would accept 20-30 FPS in the most resource intensive areas. But I certainly wouldn’t mind if I could get more, my monitor supports 100 FPS.
Can’t wait to see what the new NVidia hardware combined with a power CPU can do for this sim. I’m already saving for a Christmas upgrade.
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I can tell the difference between 60 and 120fps instantly, so yeah, the “human eye can’t see more than 30fps” is bull***
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I also confirm 446.14 driver makes no difference wish it were otherwise. Even tried totally disconnecting from the internet and flying manually cached scenery CPU getting occasionally hammered while the GPU loafs along at 75. I swear it was not this bad yesterday.
I think this thing is haunted.
i5 6600k, SSD, 32 G mem, 1060.
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I’m having the same issue, my GPU is just above recommended (1660Ti Mobile) so I would expect to have some issues at high settings there…but I have a Ryzen 7 4800HS, I know for a fact that I SHOULD be GPU limited, but constantly it’s telling me that I’m “Limited by main thread” and I have 40% CPU usage. It also shows that I have plenty of VRAM left for my GPU so I know it’s not just indicating it incorrectly. It just doesn’t make sense, have tried changing any and every setting and the FPS only changes by 5fps…
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what many dont seem to understand is all rendering is performed and maintained in separate threads, but are governed by a world thread that sits on ONE cpu core/thread. When you see 8 cores with 7 at 25% and at 100%, that 100% is the world thread core. Once it hits 100%, the other threads will usually finish their task then the main thread will do its job, but the other threads are usually finishing prior to the main world thread issuing another series of tasks to perform.
this is the issue with ANY game and exactly why intel has dominated for so long over AMD, because of the higher single-core clock speeds and performance of the world thread. 5.3ghz on the world thread core will allow higher fps than 4.6ghz on that same world thread.
you need to not only see how much performance the CPU can do in total, but how much that world thread is idling. if ALL cores/threads of your cpu are at 25%, the cpu isn’t running the world thread at it’s highest yield and sacrificing fps, but there should always be 1 core/thread at 100% while cpu bound.
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Just to acknowledge this…I have an 8 year old CPU 4 core…running a GTX 1070 8GB, and can easily get and maintain 27-31 FPS pretty much all options set to Ultra. So I agree, with some of the newer i7/i9/i10 CPU’s…something seems to be happening.
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And how about running the SIM perfectly and still having memory dumps ? Have you checked your Window Event Viewer recently ?
I get crashes on initial startup in event log if I don’t run Xbox first. But not one crash in game yet.
I have heard from the beta testers that the game ran smooth before the release build. This can probably be fixed by the devs if they can figure out what went wrong.
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I’ve got a 9900K waiting for me to replace my 9700K. This thread makes me nervous to upgrade my cpu.
The problem is probably to do with how the CPU (in the game) schedules/sends draw calls for the GPU. If you can, try turning on Hardware-accelerated GPU scheduling in the windows graphics setting if you have it. Once DX12 releases, it will also alleviate this problem (It really should’ve been DX12 from the start, honestly). But I hope the devs try to make this as best as they can, as soon as they can.
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