Just now, Alvega said:

The problem is not your CPU or GPU, I have the same CPU and a GTX 1660 Super and I get 55 FPS on the Caribbean in 1080p. Unless you are running 4k your problem lies elsewhere.

Nah, im running at 1080 (but with render scaling at 120)

Just now, xender said:

Nah, im running at 1080 (but with render scaling at 120)

I have the same CPU but use render scaling 100.

6 minutes ago, xender said:

And here you have it... "Limited by mainthread" but how is this possible if all the cores still have margin to grow? Puzzling. No core is even at 80%

 

Since you say you are 5 hours into your flight I am pretty sure you have run into the known issue of the performance degradation over time. It's still an unsolved mystery but you can try this workaround, I just found and posted in the MSFS forum:

Quote

When the FPS drops to an unacceptable low value (or precautionary shortly before top of descent):

- Save the flight

- Go to the Main Menu (no need to close the sim)

- Load the saved flight

FPS were back up to normal after reloading the flight. Only drawback for me was that I had to reload the flightplan into the FMS of the FBW A320 (and choose a direct to the current waypoint), but that just took me a minute.

 

Edited September 8, 20214 yr by RALF9636

1 minute ago, RALF9636 said:

Since you say you are 5 hours into your flight I am pretty sure you have run into the known issue of the performance degradation over time. It's still an unsolved mystery but you can try this workaround, I just found and posted in the MSFS forum:

 

I think this is indeed the case. Just to test i applied the low-end graphic profile and im still getting 14fps

1 hour ago, fogboundturtle said:

Your CPU is really old and core bottleneck. 

With low usage on all but one core?  4790 is no slouch!

Edited September 8, 20214 yr by fppilot

Holly fck! Turning off the online traffic fixed it!

On the "Traffic" section i turned off the "Aircraft Traffic Type" and on the data tab i turned off the  "Live real world air traffic" and "Multiplayer"

Look at this... what a difference

This is the same flight. I just turned off those options

I dont know which of those was the culprit but for sure its fixed now

Nice finding. Never had that problem but I don't do long flights. Possibly there is a problem with AI traffic after some hours of flight.

If it's traffic related I'd suggest it's either a bad livery (paint) or a bad model. Are you using any traffic addons like Project MegaPack?

1 hour ago, fogboundturtle said:

Your CPU is really old and core bottleneck.

I don't think so.

Look at my sig, his CPU is newer then mine.  I have the DC-6 too, frames locked at 30, after WU6, performance is excellent all around.

1 hour ago, xender said:

Sure, i know... old and loya

I don't think your CPU or GPU is the culprit, looks elsewhere as I have an older rig with excellent performance even with the DC-6.

12 minutes ago, xender said:

Holly fck! Turning off the online traffic fixed it!

On the "Traffic" section i turned off the "Aircraft Traffic Type" and on the data tab i turned off the  "Live real world air traffic" and "Multiplayer"

Look at this... what a difference

This is the same flight. I just turned off those options

I dont know which of those was the culprit but for sure its fixed now

Glad this works for you. Please report back if performance stays fine and does not degrade again.

For me this did not work when I last tried it and I ran into the issue even with AI traffic off (some others have reported that too).

 

Just now, CarlosF said:

I don't think so.

Look at my sig, his CPU is newer then mine.  I have the DC-6 too, frames locked at 30, after WU6, performance is excellent all around.

your CPU is really holding you back. You are not even meeting system requirement. Now the DC-6 is a big of a red herring as it's really limited on all system. I barely get 40 fps on the ground and my PC is a beast. If you try something like a 747 or 787 and you will see how limiting your CPU is.

14 minutes ago, xender said:

Holly fck! Turning off the online traffic fixed it!

Great!

Must have been 4790 aircraft in the air..... 😲

Edited September 8, 20214 yr by fppilot

1 minute ago, fogboundturtle said:

your CPU is really holding you back

Really, says who, you, I don't think so. My rig performs flawlessly, cant complaint and I'm not about to spend $$$ on hardware when my hardware keeps a steady 30fps.

3 minutes ago, fogboundturtle said:

your CPU is really holding you back. You are not even meeting system requirement. Now the DC-6 is a big of a red herring as it's really limited on all system. I barely get 40 fps on the ground and my PC is a beast. If you try something like a 747 or 787 and you will see how limiting your CPU is.

Give it a rest on the "your cpu is holding you back"...you have no idea what you're talking about!

With reasonable settings a 4790 is more than adequate to run MSFS.