Especially since in the current absence of any multithreading optimization, even using DX12, half of the cores are twiddling their thumbs while the simulation is running. which leaves a significant margin to all external applications.
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Ok got it. A different opinion with facts is not allowed. The 7800x3d is great and the 7950x3d a complete waste.
Was the same with the users above, some guys can’t accept such things.
Is it possible, that people are talking about different CPU temperatures here? Any Ryzen CPU tries to push as hard to the limit as it can (when used). My 7950X3D shows about 65 degree Celsius or less CPU temperature when playing MSFS. But the CPU Die/Hotspot temperature is way higher reaching the 90 degree limit set in BIOS. It was about the same with the 5800X I had - it got even hotter.
So you have to be sure what numbers you are looking at. Use HWInfo for that.
This is while using Cinebench Multicore Test.
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Hang on you said it could of been a bad chip in a previous post so just going by what you said. Nothing more. I have no agenda and don’t own either chip.
I said it could be, but that was a more general statement. It was a good batch according to ASUS and the undervolting results.
But nevertheless, I lost this discussion. I just wanted to share my experience with my 7800x3d and the difference between the 7950x3d but negative feedback about the 7800x3d is not allowed here as it seems.
There are plenty other guys with high temps on the 7800x3d without any high workload.(Just leave the MSFS bubble for a moment) But yeah my 7800x3d with 90+% usage was “abnormal” and I made a mistake.
Not even close. When im benchmarking it, it gets “up to” 80c MAXIMUM!
In MSFS, with Ultra settings and multiple programs running along the sim (Spotify, VA Tracker, Spad.Next, etc.) it stays around 60c when using PMDG 737 or FENIX A320.
I have SMT (hyperthreading) disabled tho, as this gives me a FPS boost.
As cooling solution i use the be quiet! Pure Rock Slim 2, a very capable 30bucks air cooler + a few chassis fans of course, but nothing extraordinary at all.
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I don’t think you lost the discussion, you shared your experience, it is valuable, others have had different experiences, valuable as well.
My two cents:
Recently I was helping a fellow simmer troubleshoot an issue whereby his 7950X3D/4090 combo was giving him unsatisfactory experience, it’s all documented in another thread.
He was seeing FPS in the low 20s, sometimes even high teens, and it all seemed very baffling. After attempting a number of fixes his issues were largely resolved by reinstalling everything: a fresh, vanilla install of MSFS was displaying performance consistent with numbers available on various reviews.
I understand that you are an advanced computer user -delidding is not for everyone- and that you attempted a reinstall to no avail. So I am not trying to suggest that the same steps would have made a difference in your case, I trust you did take the necessary steps to troubleshoot your situation.
However I saw something interesting in the other case I mentioned: with many companion apps installed, and high resolution VR headset plugged in, FPS went from high 80’s to low/mid 40+ in 2D mode, in a large airport. Again this is on a 7950X3D/4090 combo.
On the surface it could seem this validates your point which is that the more intense/complex MSFS usage is, the more higher end chips are sort of a requirement.
I asked our fellow simmer to share hard data on core usage, and he kindly did: to my surprise, in his case, the non 3D cores were barely used if at all, and the Vcache cores still had quite some room to spare.
My point is that I don’t feel this is conclusive evidence either way.
Certainly looking at this detailed core usage one could think a 7800X3D would not provide a vastly different result in 2D, but this is just one ‘data set’.
Experiences can vary a lot, from one setup to another.
I would love to see similar hard data from your current or previous setup, showing detailed core usage on your system, and would be happy to learn it displays a different pattern with regards to core usage.
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I have also noticed while running companion apps with the sim temps get pretty toasty. Yesterday hit 80 celcius while running spadnxt, fsltl, fsrealistic, and navigraph on seperate monitor that was connected usb to hdmi. First time using a second monitor with this CPU. The only reason I had second monitor connected this way was I couldnt find my dp cable to connect to gpu…lol. going to test to see if connecting to GPU changes anything.
I don’t feel this is true.
What bothered me was the “it was a bad choice” statement and this one:
“all the applications you need”. No, all the application you need. Not everyone is going to use all those or need all those.
It’s the absolutes here that frustrated me. We are all going to use the sim differently. One way isn’t wrong and the other right.
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Especially as MSFS doesnt really make heavy use on more that 1-2 cores. My 7800X3D is not maxed out on any core, even with all the background programs running that he mentiones.
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What cooling do you use?
Wow, no need getting personal…
Lets go back to topic now. Some experience hot temps, others dont.
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Well, do you understand that any video output if it is not directly coming from the gpu it is then controlled and loaded on the igpu?
Although I don’t use the igpu and don’t know how much it does affect to temperatures while using msfs. On my 7950x3D I found the igpu a very weak alternative (struggling with 4k video streaming) to be merely used as a diagnostics video output.
Check the temperatures with your external display connected to your gpu. Would be interesting to know.
There are DP-HDMI/HDMI-DP converters available that can help you with that.
In my case I am monitoring the die, which has consistently been the highest temperature reading of all the available temperature sensors.
Ok, then do you maybe limit frames or have a low resolution or are heavily GPU limited? It seems, the CPU does not have much work. If it is under stress it will reach higher temps. With a 360 AIO it could boost higher. Anything is limiting it. When you do a Cinebench run, does it also stay that cool? If it does, there has to be a limit the CPU runs into.
I get 100 FPS in 2D (limited by VSync) mode with 7950X3D and a 7900XTX on 3440x1440. The GPU runs at about 90%. The CPU clocks until it reaches the 90° limit.
In VR the CPU sits cool because the GPU is under stress.
Thats just what I see on my system. This thread is a bit out of control. Surely the 7800X3D is a great chip for MSFS.
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I have a 7900 XTX, as well, and I run at 4K on an Asus 28” 60Hz gaming display. I have Vsync on at 100%. Ultra settings.
I have EXPO on and PBO enabled with a 10x scalar and -10. I’ve done no optimizations at all. I just “borrowed” that from Tom’s Hardware as a baseline to check out.
In Cinebench I see a peak of 83.1°C in multi core and 66.6°C in single core. Most of the time, though it ran lower. For example, the ave for the single core test was 59.0°C.
I think what we may be seeing is the energy efficiency of the 7800X3D being responsible for these sorts of cooler temperatures vs. the 7950X3D.
I’ve been trying to locate the ECO settings in my BIOS, but haven’t quite figured out where it lives and what those settings might be.
My temps are comparable to the temperatures for the 7800X3D posted here:
” TechSpot never saw the 7800X3D rise above 84 degrees Celsius during all-core workloads in Cinebench R23, or 66 degrees during the program’s single-core test.”
Quoted from:
Ryzen 7 7800X3D: 5 things you must know about AMD's gaming CPU | PCWorld
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Kraken Z73 360 Aio
Yes I understand that. Once I connected to gpu with dp cable, temps dropped.
This is my setup. Only have front monitor. If i were to add 2 more monitors for side views, it would leave me with 1 output left to run both g1000.That is why I need usb to hdmi to run the two G1000s.
Yeah so for me, i think i would be better off with the 7950x3d for my setup
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Bro, that setup 
tell me more about it, what instruments n stuff are you using? Is the shell selfmade?
And yeah, in your case, the 7950 MIGHT make more sense, but not necessarily.
Same, monitoring die.