Intel CPU clock speed at minimum during MSFS slow loading - Why?

[Crunchmeister71]

@Salem978

I think I saw it hit 14% once

That really doesn’t mean much when it’s overall CPU usage. You have to look in the Performance tab in Task Manager and switch to Logical Processors and see what your individual cores / threads are doing. That gives a much clearer picture than just seeing what overall CPU usage is.

[Crunchmeister71]

@AdriftCleric810

My cpu usually sits around 13% which is about one core nearly fully loaded. I counted 7 cores at idle last night.

MSFS is quite multithreaded, even in DX11. Just not the loading process.

Now, if you’re seeing only 1 core and others near idle while actually flying, then you have a problem somewhere. While loading though, that’s not unusual at all.

[sneaky74]

@Ed1Flying

My PC system includes an Intel i9-11900K and an Nvidia 3090 GPU. The load time for MSFS to reach the main menu page is very long - sometimes not completing at all after 10 or 15 minutes until I give up and close the program. On the second try, it usually completes after a long wait.

Hi just did a test with MSFS SU7 on my 9900K with a 970 EVO Plus NVMe™ M.2 SSD and it took 3 minutes and 55 seconds to load fully. I have about a dozen add-ons in my community folder which is mapped to a mechanical drive. I would say though that’s probably about a minute slower than previous patches so it is a little slower than usual but this has never bothered me as getting into a flight is super quick.

Just noticed you also have an NVMe™ M.2 SSD storage. If you are using one of these already then I would say you have some sort of issue you need to address - google “Slow SSD performance in Windows 10” as there is a surprising number of optimizations you can do to improve matters.

Good luck!

[Salem978]

Overall core use is a quick easy way to say wow, it’s a single thread pileup and my video card is currently working harder.

Oh and Direct-X 11 is famously limited to four cores DirectX 11 vs DirectX 12 Multi-thread performance: Ashes of the Singularity | Overclock.net

[Crunchmeister71]

@Salem978

Oh and Direct-X 11 is famously limited to four cores

MSFS currently uses those 4 cores quite well while in a flight. DX12 should allow for better optimization across more cores once it’s rolled out and once the sim is programmed to take advantage of this new capability.

[Salem978]

Anyway … I think the issue is heat throttling.

Makes absolute perfect sense … and for a completely different reason I’m going to blame heat in another thread too.

[Salem978]

As of late, yes, it has gotten much better.

[Crunchmeister71]

SU5 helped a lot. Moving CoherentGT / glass panels to a discreet thread and off the main thread was a huge boom for performance. They need to do this with other heavy workloads (like LOD) once DX12 becomes the standard.