Last week I’ve upgraded from i5 13600k to the new 9800x3D. Very happy with the CPU. But after the take off (above around 1000ft) the FPS will drop on random moments and sometimes several times in a row the FPS drops dramatically. With the help of MSI Afterburner and task viewer I can see that it will happen on moments that the CPU utilization rises to 99%, MSFS is the source of this spike. Overall the FPS is very well: around 140FPS in the air. But the drops will bring it back to random numbers: 23FPS or 35FPS and after a second of lagging, it will restore to the example of 140FPS. CPU temperature doesn’t exceed 55°C. On the ground these lag spikes does’nt happen.
I haven’t changed anything in MSFS settings after upgrading from Intel to AMD. I transferred the GPU and RAM memory. This concerns an MSI 4080 and 64GB RAM DDR5 from Corsair, playing on 1440p with TAA.
What I have tryed:
Completely re-install MSFS and start over with only the Fenix A320 and Active Sky active. No change.
Playing around with TLOD. No change.
Changing XMP-profiles and switching XMP-off. No change.
I simply can’t solve it myself. The strange thing is that the 9800x3D should have at least the same performance as my old 13600k. But actually even a little better. That’s why I find it very vague. I never had this problem with the 13600k.
Furthermore, MSFS is on an m2 nvme disk. I have fiber optic internet with 1Gbit/s.
Hopefully you can help me! Otherwise I think I’ll go back to my old trusty CPU.
With the C172 in use and AS off the CPU-usage stays stable and relatively low. Around 30-40% and that gives a flawless flight without FPS-drops. Also tried with AS on, and that doesn’t give any difference. Stays stable in CPU-usage and FPS. Both tried above London.
I also completely reinstalled the Fenix when I reinstalled MSFS.
The problem stil exist! I’ve made a short video where you can see the FPS drops.
To give a few examples:
0:03
0:11
And the worst one 1:23
Cleared rolling cache, SceneryIndexes, SceneryCache folder and Content.xml file deleted. This all doesn’t solve it… TLOD is now on 100… But even TLOD 70 gives the same problem. With the 13600k TLOD 150 was always perfect.
After hours of driving myself crazy and trying everything I can find… Last week, after assembling the PC, I enabled the x3d gaming mode in the MSI BIOS.
As a test, I just turned this feature off. Since then the frames seem to remain stable! My wrong idea was that this function activates the 3D cache. But it turns out to be a boost function, which also turns off some things on your processor. That may explain why MSFS ran so unstable, especially with the Fenix. This is full of scripts and things that make your processor work hard.
I have the same issue on an Intel i5 11400f so obviously no x3d option is available for me. I’ve noticed the lag and cpu usage happens mostly with an area full of trees, but it’s not all trees that make this happen.
After a lot of flights in the meantime, I can now definitively confirm that the BIOS setting ‘‘x3d gaming mode’’ was the problem. Since I set the setting to ‘‘Off’’, I have had no more hiccups and made beautiful flights.
