For the moment the LFPG flight to FACT is at 1h30 and still no CTD with the GTX 1080 TI and the HP Reberv G2.
When you know that with the RX 6800 XT and the HP Reberv G2 on the same flight, I always had a CTD after a few minutes, you might start to think that 6800 XT and the HP Reberv G2, would not be the best combination …
EDITION: The HP Reberv G2 goes to sleep after a while despite the change in the registry, and to have prevent the sleep in the device manager. I switch it to VR and it starts again. We are now at 4 hours of flight. And 0 CTD