Hello,

I am sorry that you are having an issue with black screens. When the card's fans ramp up to 100% fan speed attributed with a black screen, this indicates that the Over-Current Protection feature on the card is being triggered. This can be caused by one of two things;
1. The card has faulty OCP
2. The Power Supply's 12v rail is fluctuating in voltage

There are some troubleshooting steps we can do to isolate the source of the issue. The first (easiest) method would be to test the card in another system. If the issue follows the card to another system, the issue would likely be with the card.
The second method would be to test another power supply in the system. If the issue goes away with another power supply in the system, the issue is likely the power supply's 12v rail fluctuating in voltage under load.

If you are able to troubleshoot this issue, and you have isolated the issue, please let us know of the results so that we can move forward accordingly!

We look forward to hearing back from you with your results!

- Jacob B.

I would like to point out that while a 650w power supply should be sufficient for your build, the unit that you have as a very weak 12v rail.
An EVGA power supply rated for 650w would have a 54 amp single 12v rail (or multiple rails that add up to about 54 amps).
That Sentey unit has a single 16 amp 12v rail (under 200w rated watts of 12v DC power). I would expect that combination of i7 and GTX 1060 to require about 20-25 amps when under a full load and that power supply is likely not able to run the system stably.

I thought to buy a new psu better, but for its price I do not want to spend that money and that the problem is not solved

If I have to buy a psu, what do you recomend me? economic. my card is under warranty, i think. change?