DX12 massive FPS drops

Guys

This is not a Forza 7 issue but same happens on BF1, The Division and mostly ALL DX12 Games.

I’ve tried 3x GTX 1080Ti Video Cards, 2 Complete different rigs, 5960X and now 7900X, several NVMe SSD’s, PSU’s and more. Tested Many W10 vesions like 1607, Creators and Insider Preview, different NVIDIA Drivers and still same issue.

Game will freeze or get sticked like a second with FPS drop from 100 to 1 or 2 and then back to 100 again. Honestly i can’t solve this i don’t know where the hell it comes from.

If anyone experiences this please let me know.

Thanks to All !
Sergio