hi all,
good news it seems.
Apparently, 2080 should run possibly around 70-75 degrees, and under 80c.
Vram can get hot and instable, and this is the cause of lot of cuda errors.
I tweaked fans, now i'm keeping temperature under 70c and i did not get a single error anymore.
In case you're one of those struggling with this issue, try it.
A big thank to Lino Grandi for suggesting this !
Paolo