Nvidia GTX 660 Ti: periodic \"freezes\" the entire system

Hello. Describe the whole problem.
I have two video cards: Nvidia GTX 465 and 660 Ti (that is, the version with overclocking). The first works fine, great, no complaints (but it already old, so not all modern toys pulls). A second video card gave my brother, whom she, by the way, is well.
The essence of the thing: when you install the 660 Ti, after some time after starting the OS, the system begins to hang out for a few seconds with an interval of 2-3 seconds between them. This occurs, for example, after starting the game and continues even after restarting the computer. It comes sometimes even BSOD.
In the beginning sinned on the power unit, because I have a 550W, and 600W brother. Checking on the calculator power your system, have found that I have to spare are all missing.
Rummaged in Google and found that it is likely to curve factory overclocked. Tried though something to do with it, but without success. I was not clear: the problem is that the acceleration is too high in frequency and it is necessary to reduce them, or that it is too small and need to increase it.
Nevertheless, managed to find an interesting relationship: the fact that with increasing temperature the graphics card to 43-47 degrees just start all these hang and everything else.
In other words, there are several possible options:
1) power supply too weak for your graphics card (I personally think this is less possible)
2) the Frequency of factory overclocking exhibited bad and they need to reduce/increase
3) High frequency acceleration all the work of the graphics card by increasing its temperature.
Maybe it's something else.

System features:
Intel Core i7 7740X;
ASUS TUF X299 Mark 2;
x2 Kingston Fury 8GB DDR4;
Samsung SSD 250 GB;
Hitachi 1TB HHD;
Thermaltake 550W Bronze.