First of all, I´m pretty aware of the fact, that my CPU is not really suited anymore for this kind of task. But I´dl like to have a confirmation, that this is really the cause for my issues, before I may think about a hardware upgrade.
So, here´s my problem:
The sim loads flawlessly, until the “fly now” button comes up. It doesn´t matter if I click it right away and end up in the cockpit, or if I do nothing at all and watch the sequence that shows my plane on the holding point. The CPU load goes up to 99-100%, GPU load is as low as 0-5%. FPS go down to 1-5 fps, and the whole sim becomes more or less unresponsive for a minute or so. After that, CPU load decreases (80-95%), GPU load reaches normal levels (35-85%), and the sim becomes pretty fluid and flyable, with FPS figures between 15 and 55, depending on the scenery, the weather, etc.
Same happens, when I change weather conditions after the flight has been loaded.
What is causing this behaviour?
i5 3570k @ 4.3 GHz
16 GB CL9 RAM
GTX 1070 8GB
Win 10 on 512 GB SSD
MSFS on 512 GB SSD
50 Mbit stable Internet connection (rolling chache @ 25 GB)
Upon installation, the program set the sim´s settings to “high”. I´ve manually changed some settings back to “medium”, resolution is 1080.
Thx a lot in advance for your input!