I get 100% frozen frames with the Aerofly sound continuing in the background and ctrl/alt/delete and task manager exit gives me a working PC. The only changes from a previously working Aerofly is that (1) it is 11 months since I had used PC FS2 and (2) it is installed on a new 2TB hybrid drive.
My CPU is an overclocked Pentium G3258 which 'CPU-Z' confirms is running at 4.2 GHz although it seems to throttle down to 800 MHz when idle (relevant?). My graphics card is an Asus GTX950 OC Strix which I have used with a variety of built in and custom performance settings. When I check the GPU performance display after a freeze the GPU has been running at about 25% of maximum. The drivers are new, issued on 24/4/18. Windows 10 with all the smart monitoring turned off is in use.
Previously any crashes were from running FS2 at 120GHz or unlocked with adaptive VSync and the post crash GPU performance had hit (fatal?) 100%. The output is 1080. Now with unlocked and adaptive Vsync, most of the time the control menus are sluggish and the frame rates are between 10 and 15 fps but occasionally I get 60 fps on a fresh PC boot but it is still prone to freeze. The graphics card fan never cuts in and the temperatures are basically room temperature. I always did a computer restart after a freeze.
My only other installed game is Eurotruck Simulator2 which runs fine, it is installed on a SSD.
I have tried a variety of bottleneck solutions such a CPU virtualization in BIOS (I checked compatibility) and manual Nvidea control panel overrides but nothing helps. The freezes were apparent from the initial installation (about 2 weeks ago) and could be triggered by adjusting the Dash 8 nav radios or running into JFK at dawn with marginal visibility in a more basic aeroplane.
My graphics card has 2 GB of memory, has FS2 outgrown more basic cards during my time out or could the hybrid drive solid state management be slowing me down? I ran the Steam file check which was OK.
Any ideas please?