Graphics card problems. GTX770.

Guys, help me, what could be the matter? I assembled the computer, however, with endless hemorrhoids - during the game, and sometimes even with simple viewing of the video, the screen goes out and is restored with the error "The video driver stopped responding and was restored."
I reinstalled the drivers and the system 100,500 times, but no sense.
Maybe something conflicts with some of the components? Or is the problem in the vidyuha itself?
Win7
Processor: i5-4670 Motherboard
: Asus H87M-Plus
Vidyaha: Palit Geforce GTX-770 JetStream
PSU: Zalman 750W
RAM: Corsair Vengence 8gb [2x4]
UPD: I
loaded the video with ATITool for several minutes - fps is stable ~ 3k and the temperature is not above 80. Checking for artifacts also gave nothing.
There are a few more features:
1) a reboot helps to solve this problem (usually temporarily)
2) sometimes Winda7 puts a simplified topic referring like a lack of memory or something like that.
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Using FurMark at max: average fps - 143, minimum - 114, maximum - 225.
Temperature is not higher than 80 (average 75C).