the problem

Good time of day.
The problem is this, Began to disappear, the image just Make a bootable USB flash drive, for 5 minutes, 30 times blinked(disappeared for 2 seconds). I go to assassins creed origins 1 time 2-3 seconds, second time a little longer, and there is unpredictable, up to the complete attenuation, and the sound and the process continues(with a black screen reached the circle of stones in Siwa and listened to the video), tired, press alt+f4 after a couple of seconds goes to desktop(image appears) and again begins a periodic to disappear. It all started from an equal place, is a monitoring system in all games, the GPU temperature did not exceed 61 degrees, CPU 55 degrees. The PC drove and actually following him. All kinds of cleaning once a month, and the accumulated dust is not particularly(2 fans on blowing, 2 on blowing. Are dust filters), prompt fragmentation of the hard etc. we have ruled out Viruses. Fresh thermal grease everywhere. Aida shows that with the addition of the all good, the tension everywhere norms comes only device Manager gives the properties of the video card this and similar nonsense-Install driver nv_dispi.inf_amd64_fc56881b093ee941\nv_dispi.inf for device instance ID PCI\VEN_10DE&DEV_1184&SUBSYS_84651043 &REV_A1\4&15001D53&0&0008 failed with the following status: 0x0.

My system:
asrock h61-hvgs
i5-3470
asus gtx 770 oc 2gb
8gb
2500 gb
aerocool 600w(12-volt line 552w)

The monitor is connected via an adapter dvi-vga