Classic British Flight Sim

Hi all, has anyone else noticed a performance drop in both 2020 and 2024 after recent updates. I'm not bemoaning the usual 'I want more FPS' but I have noticed a considerable drop in both sims performance which in turn led me to look at the FPS. I'm getting a fairly solid 44-45 in both and it's main thread limited. I'm definitely not short of resources and have tried all the usual culprits for performance dips. Obviously FPS isn't everything but noticing stutters and jumps now which destroys the immersion.

The PC is a i9 14900, 128Gb DDR5, RTX5090 so I should be getting far better than that. Doesn't seem to matter what graphic options I choose the figures remain the same. Any ideas?

Thanks

Brian

Hi Brian. I’ll have another go tonight, but I didn’t notice anything significant on Sunday (but I wasn’t really paying attention as I was doing battle with the stupid flight planner which won’t properly import flightplans)

Hi Ben

I had a session looking at it yesterday focusing on CPU utilisation, particularly on non-MSFS items that were draining resources. I found that the Sysmain service was particularly guilty. This is the Windows SuperFetch function where Windows lines up likely next programs and files that you 'might' open next. I disabled the service and instantly MSFS2024 leapt up to an average 60 FPS with everything maxed out. More importantly its as smooth as snake skin now.

Brian Franklin wrote: ↑

10 Sep 2025, 07:55

I found that the Sysmain service was particularly guilty. This is the Windows SuperFetch function where Windows lines up likely next programs and files that you 'might' open next. I disabled the service and instantly MSFS2024 leapt up to an average 60 FPS with everything maxed out. More importantly its as smooth as snake skin now.

That is IMPORTANT tip to current and future MS2020/2024 users!!! Thanks for your great tip that will protect any future MS2020/2024 such as me from any potential problems

Regards,

Aharon

TSR2 wrote: ↑

09 Sep 2025, 07:16

I was doing battle with the stupid flight planner which won’t properly import flightplans)

Dare we should ask you for details on your battle??? Just kidding

As an update to this, I've just installed the MSFS 2024 SU4 Beta and am very impressed. I am now getting a solid 120-140 FPS, still smooth. in VR I have capped it to 60 and its amazing. They have also changed the main screen to be just a single window when in VR instead of the two separate eye view windows that it used to show. I don't think I will ever be returning to 2020 except for development work as the immersion is just so so much better in 2024.

Is this still using disabled superfetch, Brian, or did the update make that unnecessary?

Hi Mike,

I have still kept the SuperFetch disabled as the update wasn't aimed at that area. The SuperFetch mod is a Windows change and not an MSFS one.

Brian