So I have been dealing with this issue since I started doing long hauls on flight sim,.
When I fly GA aircraft the gpu usage is at 100% all the time which is great, it means the sim is using all of my pc resources. But after 4 hours or so I see it goes down to 80%. Now, I have been flying the 747 lately in real time. Besides airliners not using 100% gpu (usually 80% to 65%) I notice that after around 7 hours into the flight the gpu goes from 70% to 30% and the fps are so bad. The only solution to this problem is to restart the sim.
I have downloaded Intelligent standby list cleaner for possible memory leak, I have played with process lasso settings, I have set the nvidia control panel for the highest performance, I went into task manager and set the sim to high priority, I even did a complete graphics driver wipe. And still. The gpu simply goes down from 70% to 30%. My temperatures are good. My gpu temperatures were at 60C, and my CPU at 60C to 70C. It is not thermal throttling.
No, it’s not the VFR map. No, it’s not avionics refresh rate. No, it’s not windows update. No, it’s not Nvidia drivers. No it’s not AI traffic because I have it turned off.
Gpu usage just degrades with time on ANY airplane.
Below my specs and a screenshot of MSI Afterburner performance monitoring. Please this is so frustrating, I’ve spent too many days and hours trying to figure out what is happening.
My specs AsRock Z390 Pro 4 Intel LGA 1151
Intel Core i7 9700K 4.7GHz
GeForce GTX 1080 Ti 11GB
32GB 3200MHz DDR4
Looks like just before it happened I almost had a CTD as shown in the graph.