FG - off
Ryzen 7 7800X3D vs Ryzen 7 9800X3D
https://forums.flightsimulator.com/t/9800x3d-21-faster-than-the-7800x3d-1080p-highest-turbo/663355/199?u=tenpatrol
I’ve been saying for a long time that AMD CPU and 4 memory sticks is not a good idea. To find out why, check the two links below.
https://forums.flightsimulator.com/t/32gb-vs-64gb-ram-experience/656398/249?u=tenpatrol
https://forums.flightsimulator.com/t/32gb-vs-64gb-ram-experience/656398/230?u=tenpatrol
I replaced 7950X with 9800X3D and it still performed lower than 7950 in AIDA64 tests. But I was recording 210FPS in flight with 4090 at 5120x1440@120Hz. I can see the 9950X3D to step it up and the 5090 to push 240Hz 7860x2160 with DP 2.1 monitor.
Single or multi thread? Because it is expected to perform worse than a 32 threads cpu in a multi threaded test.
From AIDA site:
Additionally, it scales much better for multi-core CPUs than the previous Queen benchmark, taking full advantage of modern processors’ parallel processing capabilities.
The 7950x has 2x the number of threads/cores, so it will outperform the 9800X3D. But for MSFS and other games, the number of cores/threads isn’t the most important aspect.
Thank´s a lot mate. Even if not intended for games the 7950X is still a beast and in some aspects with better specs if you check details at AMD site:
9800X3D: 8 cores, 4.7/5.2 GHz (base/turbo), 640KB/8MB/96MB (L1/L2/L3)
7950X: 16 cores, 4.5/5.7 GHz (base/turbo), 1024KB/16MB/64MB (L1/L2/L3)
Anyway I don´t think any of the recent and upcoming CPUs are a bad choice. 2025 will be an interesting year in terms of HW.
Cheers
That’s what I was counting on. When the 7950X3D was released I was told it wasn’t worth it to upgrade. Waiting for 9950X3D. See how it Benchmarks.
Did you solve the issue with a x2 memory configuration?
I haven’t had the chance to test it yet. There’s another issue I think is holding it back which is thermal throttling. MSFS on Pimax last night reached over 90C. Either I didnt put enough thermal paste, it was too old, or I tightened the AIO down too much. Bought new paste and will be reapplying. Once that’s complete, I’ll try the RAM issue.
FYI, during my tests
https://forums.flightsimulator.com/t/9800x3d-21-faster-than-the-7800x3d-1080p-highest-turbo/663355/199?u=tenpatrol
at 2K resolution, Ultra settings, TAA and LOD set to 200/200, a 11-minute flight over Manhattan (KLGA-KLGA), the maximum temperature was around 58 degrees with an average temperature of around 52 degrees Celsius. So your 90-degree readings clearly indicate something is wrong. I applied Thermal Grizzly Kryonaut thermal paste on CPU IHS and CPU is cooled by an Arctic Liquid Freezer III 360.
The 9800X3D doesn’t thermal throttle until 95C. Mines been spiking to 90C too but only briefly and hasn’t dropped clock speed at all, and mines OCed to 5.4GHz. Operating temps when flying in VR are 5-10C cooler than what my 5800X3D’s temps were with the same 240mm AIO so I’m pretty happy about that and am not worried about these brief temp spikes that my 5800X3D didn’t seem to do.
I think you found the issue. Not even my 7800X3D get to those temps. It stays between 65-70 over PG cities like NY OR LA. Did you check the clocks? It might be throttling to lower the temps.
New results from a 10 min Cinebench 24 after new application of Arctic MX-6 thermal paste:
Multi-core
Max temp: 88.6C Avg: 80.9C
Max clock: 5,215.6 MHz Avg: 5,093.9
Score: 1304 (somehow lower than before)
I saw a post on Reddit saying his 9800X3D didn’t get over 70C on R24. I know that I applied enough thermal paste, spread it evenly and tightened the AIO correctly. The Arctic Freezer 360 is running fine. Did I lose the silicon lottery or am I totally missing something?
Although Cinebench was high on temps, 2k Ultra preset DLSS Quality over New York is averaging around 65C. When I pulled off the cooler to reapply thermal paste I realized I didn’t have enough last time. Temps are better overall (haven’t tried the Pimax yet to confirm) but frames are still the same. Going to try taking out 2 channels of RAM and see how that effects things. Thank you all for your help so far! I’ll get this right eventually.
I keep reading people getting good stable results with these settings.
Is there any great guides for 9800x3D? A guide did help my 7800x3D temps a lot, my temps were reaching 90C at R23. My temps lowered almost 25C and performance stayed the same or even better. I wish some people do some great testings and create youtube video guides for 9800x3D also.
I just did a 10-minute Cinebench R24 run with my 9800X3D OCed to 5.4GHz and CO -30, scoring 1384 for multi-core. Pretty much sat at 95C the whole time and throttled down slightly to 5.3GHz by the end of the run. Now this is with an old Gigabyte Aorus 240mm AIO that used to be able to ramp up the fans pretty high with my previous 5800X3D but for some strange reason the fans now only ramp up a little bit under full load with the 9800X3D, even with such a high CPU temp, so my cooling setup is pretty low end.
I used to worry about these sort of temps in the past, but now if it is stable under such high load and doesn’t downclock too far (it’s still 0.1 GHz higher than stock) then it will likely be fine for normal use, particularly since MSFS seems to run 65-75C in the most CPU intense areas and at idle on the desktop it sits around 42C. If MSFS 2024 changes that significantly for the worse and gets crashy then I will consider better cooling, but otherwise I’ll probably just leave it.
This is a very good guide to Memory on AM5
And here is the best guide for OC on AM5.
Why dont people just run their fans at full clatter? I just bang mine on turbo, and my 7800x3d (with AIO) never goes over 50c (with OC).
Noise. I like the silence.
