Dreadful performance

Have you folks tried turning off all online features? Good way to rule out if the performance issues are server/network related.

Plenty of people with 10900K’s have been getting stuttering and low FPS as well. Seems performance issues exist regardless of computing power. It’s just a poorly optimized sim. There is no reason a default airliner with so few modeled systems should kill FPS the way they do in MSFS

I have an i9-9900K, 32 BG 26666 MHz RAM, RTX 1070S, 1 Tb EVO 970 Plus, monitor only 2560 x 1440 (Dell U2713H), sim at default ULTRA, multiplayer off, EASY mode on. I’m a newbie. I took off from KJFK with no flight plan in a 747, just a departure, and flew over Manhattan at several thousand feet (<10K as always getting warning not to exceed 250 knots at < 10K ft). Was constantly switching between Pilot View and External View, no problem. I don’t think that I ever dropped much below 30 fps. Stupid newbie question. I have turned on both Developer Option and have MSI Afterburner data on screen. Can one log either to a file to later graph with Excel to document flight characteristics?

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Yes DX12 will improve the multicore performance

SO I HAVE TO TYPE THIS IN ALL CAPS BECAUSE IT NEEDS TO CATCH SOMEONES EYE. I am running. 3900x, 32 gb of RAM, 2080S, 500mb of SSD on a x570 Ace motherboard. I have been getting the worse frames ever when it came to this simulator and I was ready to chock it up until an update BUT… I have a dual monitor setup and for some reason whenever I have the mouse on the screen it gives me about 10 FPS but as soon as I click on the monitor I’m not using and off of the main screen I got +30 on ULTRA. I don’t know what kind of help that gives but maybe it gives lead way on some ideas on fixing this crappy optimization. Yikes

This is taking off to the west from KJFK in a Boeing 747, heading straight for Manhattan, banking on approach to Manhattan to fly north along Manhattan, Hudson River with frequent switches to external camera (but mostly cockpit view) and also a half dozen or so PAUSE ON, PAUSE OFF’s. The MSI Afterburner help says that logging will cause a bit of a performance hit so perhaps without logging I would have been a bit higher than the 26 fps shown in center of log. Computer was as my post to which I am replying, multiplayer off. Nothing done about simconnect and vsync - think both are in use.

What would really be helpful for comparative purposes if MS provided a standard test flight that logged all the relevant parameters. Since there are so many different computer configurations that would enable one to understand for one’s particular computer configuration where the bottlenecks where without everyone having to reinvent the wheel by trying to devise their own test and then comparing apples to oranges. Too bad one can’t change sim parameters in flight to see what happens.

FPS (2560x1440 WHQL monitor, sim res @ ULTRA):

GPU usage (RTX 2070S, 8 Gb VRAM):

CPU usage (16 core i9-9900K, 32 Gb 2666 MHz RAM):


BTW, @moderators, there is some ā€œfeatureā€ in the photo upload. Although all screen captures were cropped to the same width, the photo of the 1st 10 CPU usage graphs was resized in the upload. If a moderator could force its width to be the same as the others or tell me what I should do to fix the final size at the same width by editing the problem photo before upload, thanks! (tried to fix it myself by fusing all images and text into one image to upload but upload process made picture width of whole group even narrower!) - will look for Discourse language to force an image to be fixed page width

After turning OFF all multiplayer options my sim is performing much better. Buttery smooth with nobody else around. I’m thinking a lot of the issues are with the multiplayer / networking side of things.

i7 7700K
1080TI
32Gb RAM
M.2

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Just to add:
i7-4770k @4.4
RX-5600XT
32GB RAM @2400
Installed on dedicated NVME drive

On low setting (!) in a Cessna 152 in the desert with multiplayer, live weather, online and basically everything turned off I get between 11-28 fps with stutters every 10 seconds. It is an unplayable mess. Thankfully I have a gamepass trial and didn’t actually waste any money on buying it. And this is after the 10 hour trial of installation… back to P3D where I can at least have an ejoyable experience.

If it hadn’t taken sooooo long to install I would have deleted it already.

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I guess one pic sais it all:

I tried almost everything. Clicking outside the FS to bring it out of focus (or switching Windows scheduling to background task) helps - but only within the menu. Switched off DATA completely, no live traffic, no AI, no live weather, set to CAVOK instead. Flying over Pellworm, an island with very little structures density (literally just a bunch of houses and lots of sheep; I did download that to manual cache at high detail, it’s just like 760KB, but it took me like 5 minutes to draw the grids since we have to zoom in that much to do it, which is a shame, and it took almost 10 minutes to get the data on my 100MBit/s conn), graphics down to low-end, resolution set to 960x600 (half of what my screen does) and scaling slider down to 50. I get 60-80fps there, but tried to run with VSync at 30 to cap the framerate in order to free up ressources trying to prevent stuttering. Instead of getting that, the sim even struggled to maintain the set 30fps and always was somewhere around 24fps, the stuttering still happening exactly the same as on med or even high settings at my full native resolution and live traffic + weather on.

BTW I thought it was funny that someone managed to workaround the issues by switching from DP to HMDI - my monitor doesn’t have the latter though, just DP, DVI and I think even a VGA port…

I guess it’s all down to Asobo to fix this even though some are lucky enough to have found a solution that works for them.

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Hi @SPEEDBIRDlhr

I have a pretty similar setup and though it’s not great, its acceptable if I don’t want to spend 5k on another PC.
Here’s what I did to make it usable;
0; If you’re not using an SSD - Go buy one and install FS on it!
1: Overclocked the CPU a little. I have it running at 1.32 volts at 4.6 which is quicker that the standard 3.7 or whatever it was.
2: Overclocked the video card - Pain in the but this process… I used ā€˜TweakUI’, and gradually increased each setting a little until a stress test application failed. Then I’d dial it down a little, and move to the next setting. There’s a bunch of guides around.
3: (And I think this is the one that really got me going) - I wrote a batch file to kill all the processes that were running in the background that I run before starting flight simulator.
To do that, I Opened task manager after a reboot, and noted down all the background processes that I figured were totally pointless when I’m using the flight sim. Things like Apples ā€˜Bonjour’ service, Google updater, Adobe updater etc etc. Each line of the batch file looks like this;
taskkill /F /IM ServiceIWantTOKill.exe /T
…
You can find the name of the exe by right clicking in task manager, and choosing ā€˜Properties’. Dont use the path, just the exe name will suffice.
I have about 7 lines in mine, and each one that is killed gives me just a little more for FS.
So… Once you have your lines in a text file, save it as a batch file by naming it with a ā€˜.BAT’ extension. I cunningly called mine ā€˜Kill.bat’

Once you’ve done all the above,
Reboot your computer
Right click on the batch file, & choose ā€˜Run as administrator’
Have fun.

You will still get stutters just not as bad.
It will still crash occasionally. I’m hoping that stability will improve as the application matures.

Hope that helps.
PaulyFSPauly
…

Nobody mentions Windows 10 Game Mode. I guess it’s a given that we turn it on? (although an MS web page said it’s ON by default, Game Mode was off on my PC - I can’t say that turning it on made an earth-shaking difference).

Yes but I’ve heard people state that even though they may only have 4C/4T the still were able to get great performance during the beta, which makes me believe that it is possible to have smooth performance

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Finally after several days I have managed to get rid of the stutter. By install the windows 10 2004 update. GPU is working now, between 80 en 100%.

Intel 4670k 3.8 Ghz
DDR3 16 GB
GTX 1060 6 GB

Medium/high settings between 30 en 40 FPS

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I tried using a HDMI instead of DP cable as my monitor has both. Unfortunately just another tweak in a very long list of tweaks I have tried that just don’t work on my PC.

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I actually had a pretty bad experience with 7th gen, my 7700K would always do random stutters and freezes even in a web browser and in apps like Lightroom, freezing the mouse for an instant and getting back, probably everytime a core was spiking in usage - never managed to find a solution. Ended up upgrading to 9900K and never had an issue again. No other PC I’ve used ever did that.

FSUIPC also draws the framerate down, but it does not use the simconnetc.dll.

A lower FPS in unavoidable. You get that in all flight sims but in my experience to a lesser degree in FS2020 because it has a better multi-core usage. Airliners are far more complex and thus require more processing power. That puts more load on the main thread (note: all flight sims have a main thread). In layman terms: the processing time for one flight cycle is then longer before the GPU can be given another draw command, hence lower FPS. Compared to other games, a flight sim is a completely different beast in that it has to draw a huge terrain. It’s not for FPS-hunters. Perfectly acceptable performance can be obtained with 20 - 60 FPS by making the appropriate settings. Most users will therefore have to lower the quality setting for an airliner.

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For those interested, I’ve done some extensive testing yesterday and found that the sim can get into a serious CPU limited mode at certain areas, which gets the framerate down to 22 fps from 65 in my case. After this happens, the framerate will not get back to normal until you quit to the main menu.

More details, including video here: Performance issues - a clue? SCNT vs SAWC

I’m curious if others can see the same.

This happens to me as well, changing time of day really quickly causes huge stutters for a few seconds at first, and then I’m down to 20-22 fps no matter what I do. CPU usage stays at 75-80%, meaning the game isn’t CPU bottlenecked at that point (Flying quickly and low to the ground gets my CPU usage up much higher to 95-100%), but it still says main thread is the limiting factor.

What is the main thread frame time for you in this case? (frame time can be seen in the dev tools fps counter for both Main Thread and GPU in their separate graphs.

I just tried rapidly changing time of day at SCNT (the airport I’m getting decent framerates at) and couldn’t cause a Mainthread lockdown like the one I was describing in the other thread. FPS went down while I was moving the slider, then it went back to normal after I stopped.