>The HOST is on Windows 2012R2 and since 2008R2 Ms change the way core (2008) and vcore (2012) are managed. I tried to allocate more Vcores and did not get any improvement.
>Next week, I will try to implement a RAMdisk for all Tmpfile.

I got very good performance boost by hosting databases and temp folders on a SSD. Incredible. It is actually the main reason skipped the replacement of motherboard and processor, which I regularly did every three years. It's five years now and I don't feel any need.