I decided 7950X3D because I use a lot of software at the same time as MSFS and the first tests are very positive. I ordered it but I have to wait 15 days when I have already changed my configuration to AM5 
Thank you!
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A big hit on performance if you max it out. I think the general consensus is to tune your settings without any AI traffic so you can get at least 45fps at a major airport, then expect a 10-15 fps loss with FSLTL. This assures you can get a smooth 30fps minimum pretty much anywhere at any time. I personally have FSLTL set fairly low because I have a low end processor by today’s standards, which can minimize that impact.
This is also based on feedback from before these new cpu’s were released, so that guideline could change. The principle still likely holds true, that FSLTL can have a significant impact on performance.
If 48000 is a typo and you indeed only have 4800 MT/s RAM you have your problem right here. I would suggest AT LEAST 5600 MT/s RAM for Ryzen 7000 and preferably with low latency.
I am all with you here the 7800X3d Defo won’t be as good for us simmers, who have a lot running in the background, as the 7950X3D.
I am still trying to figure out wheter I should get the 7900X3D though because the only 7950X3D I can find is 120€ more expensive than the 7900X3D. I am just concerned that those 2 missing cores with 3D vchache will impact MSFS’s performance. There is just no good benchmark, like @xxYUNIORxx 's, for the 799X3D yet.
But should it perform like it does in other games compared to the 7950X3D, where they are almost equal, I think I will save myself 120€.
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PC5 48000 = DDR5 6000
Ah ok thx. so that isn’t the problem then. Sorry! 
Having additional MSFS threads beyond the CCD used by MSFS will introduce an inter-CCD latency, and one of the reasons why the 7900X can sometimes perform slightly better than the 7950X in somw games. Most likely the performance gain from 3D cache will significantly compensate for any inter-CCD latency imposed.
The whole point of the special thread scheduler for Zen 4 with 3D cache is to ensure the primary threads run on the correct CCD with 3D cache, as historically Windows doesn’t differentiate thread scheduling this way.
Yeeep!! I’m loving it. Although FG is a great performance booster, it has it’s few quirks that I don’t like but some folks might not be bothered by it. DX11 and TAA is still the best looking. Now with 7950X3D/7800X3D it is a dream.
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Yeah, as I said the, 7950X3D is way to expensive here compared to the 7900X3D and I really don’t know if the 7800X3D will be a good Idea bc I plan on streaming again and I use a lot of other programs while flying too (Volanta vpilot, vatspy chrome etc). I just wanna know if the 2 missing 3D VCashe cores on the 7900X3D will lead to a massive performance loss compared to the 7950X3D. Because looking at other games, as I already said, the difference seems to be negligible.
Well, this is one of the reasons I went with 7950X3D. Although when gaming half the cores get parked(non vcache), if they are needed, they will turn on.
Take COD:Warzone for example. I’ve noticed that some of the non vcache cores are being used aside from all the vcache cores. It’s like the system calls for more cores when needed. And as far if there are any side effects to this? I have not seen any. Playing call of duty at 230+ fps without a single stutter. Same for MSFS.
So again, if you use MSFS and all you do is just fly around with no other apps running in the background, I suggest get the 7800X3D.
If you do a lot of airliner flights which most then use browsers for simbrief and apps like Navigraph, Volanta, etc. then I would go for 7950X3D. Better to have extra unused horsepower than to have to need it and not have it.
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For what it’s worth, here are my thoughts after a few days of screwing with this 7950x3D.
I had a 7950x and replaced it for a 7950x3D. I run MSFS strictly in VR with a G2 v2 (@90hz) and a overclocked RTX 4090 (MSI Gamer x Trio) with GSkill Trident Z Neo DDR-6000 CL 30 M-Die.
My 7950x was overclocked as far as it would go and still be relatively stable. My 7950X3D was just as fast in MSFS stock as the old 7950x was overclocked. After overclocking the 7950X3D as much as I could, The 7950x was slightly faster in processor benchmarks, but not by a whole lot. However, in MSFS the overclocked 7950X3D was faster with no DRAM OC than the 7950X was with full overclocked DRAM.
My MSFS setting are all basically on ultra, LOD @ 400 with the X3D chip and pretty ■■■■ smooth. My 7950X would not run more than LOD of 250 without serious stuttering. The 7950X3D is actually smoother with a higher LOD. LOD stops at 400, but the more you crank it up, the smoother it got. I feel like if LOD could go beyond 400 the processor would keep pumping smoother and smoother frame rates.
Now with that said, I am GPU limited. My CPU is half the MS as my GPU. @ 45-50fps, that 18-20ms on GPU and 8-10ms on the CPU. I was also GPU limited on the 7950X as well, but the frame timing quality was different on the non-3D part.
I’m fairly impressed!
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It should also be noted that at first I wasn’t impressed. The FPS was better but had more stutter with the x3D. I tired just about everything and I then I noticed that turning CPU relate settings down actually made the stuttering worse. It want until I decided to crank LOD before I realized what was going on with the X3D chip.
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I’m getting into airline flights lately and I think your post might help with my decision
Running a PMDG or Fenix aircraft along with PSXT/RT or FSLTL and I’ll mostly add GSX Pro here soon, I do have simbrief though on a dedicated tablet
I do agree, rather have the extra cores laying around incase something in the near future theres a more complex addon, who knows
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Update: I was waiting to see the 7800X3D’s performance, but I bought the 7950X3D after seeing some very surprising charts.
These are not for MSFS but they do indicate that many games do in fact benefit substantially from the second CCD on the 7950X3D. This was very surprising to me since I assumed the cross CCD latency would be way too high. But apparently these graphs prove otherwise for many games. 7950X3D with both CCDs performs much better than the 7950X3D with just the v-cahce CCD (basically the 7800X3D).
This was enough to tilt the balance for me. Even though I don’t play Elden Ring, I do play Total War games, Cyberpunk etc. where this behaviour was also confirmed. Would be great if someone could test this for MSFS, DCS, IL2 and other flight sims.
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Yep, like I mentioned on my previous post, when playing COD Warzone, the game uses the 8 core Vcache but also uses a few non vcache cores. All this without a single stutter or issue.
People are really over complicating this whole 7950X3D thing. It’s like some people just looking for reasons to justify not buying it or something. I don’t know. All I know is in the past few days I been playing games on this CPU and it’s a BEAST. So far MSFS has benefited the most. It’s amazing, I’m getting almost same performance as I was getting before with Frame generation.
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I really think people are trying to understand this processor which is very new.
As for justifying not buying one, I find it simple. Cost. Not just the processor but, DDR5 RAM, new MB, 4090 series video card (to get those 200 fps), and a reinstall of the OS. For most of us, it is building a new machine. Very few people are fortunate enough to just drop in a new processor and fire up their machines.
After reading some reviews and looking at the feedback of those who have the processor if I was asked what system someone should buy for MSFS I would 100% suggest an AMD 7950X3D and if their budget allows an RTX 4090.
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I think I’ll go forth with a 7950X3D build, I already have an XFX 7900XT that I bought for MSRP, can’t really complain tbh should be a smooth experience
I have a raptor lake i7 build while it can run decently but I feel that the X3D would really shine with extra “MSFS addons” running in the background without compromising performance unlike the i7 system
Yep, definitely. While I’m using MSFS, once I open up Volanta, web browser for simbrief, and Navigraph, some of the parked cores from the non vcache CCD turn on. It’s awesome as it seems like the system keeps the sim fully dedicated to the vcache CCD while if needing more resources, it gets it from the non vcache CCD.
So now the question is, will this slow down the 7800X3D since now all those extra workloads from background apps will have to be used on that one and only CCD already dedicated on running the sim?
It’s why I keep saying, if all you do is use MSFS with nothing else running in the background, go for 7800X3D. If you intend to use multiple things while in sim, I would go for 7950X3D just to be safe.
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I would be really nice if you could share a screenshot showing per core utilization when an airliner is sitting on the runway at JFK for example.
Curious to see how much of the vCache cores are actually in use.
I purchased the 7950x3d when it launched and have gotten the opposite behavior than everyone else. I originally had a 7900x and was averaging frames in the 80s on the ground and 110 in the air. I ended up having to return my old motherboard because of a defect, and ended up returning my cpu to wait for the new 3d chips. I figured the new cpu would exceed what I had previously but I am getting frames in the 50s and 60s. Bios is updated, game mode on, game bar updated, and vga and chipset drivers are updated as well. I have a 4080 as well running on 2k so I should not be getting frames this low. Any ideas?