It seems I finally found the problem with my Phi card freezing. It just got overheated. Why?, because the provider mounted a 5110P (which is pasively cooled) into a workstation without forced cooling. Therefore, the 5110P is designed for RACK-ONLY systems with a powerful air system.
Then, I would like to know if is there any solution for this around there... I have found something like this:
But no place to purchase it from...
Thanks in advance!,
PS: I would suggest Intel people to explicitely advert that 5110P and all pasive cards are intended for rack only mounting with forced airflow.