Z-fighting, creepy stairs and flickering in all games and 3D applications

So the problem is actually in the header. For 3 months I am suffering with a terrible flicker in games (as much as it hurts my eyes), constant failures and overlay textures on top of each other (i.e. texture peripheral, such as a label on the object is constantly flickering, partially lost), all this happens ONLY when any camera moves. Heard that problem is called z-fighting. It started after I updated the computer (although she was up to it, but not so conspicuous). After the update the process was like to accelerate. Now the missing texture and shimmer so much that playing is impossible.
Tried to solve it for very long. Communicated with support for different manufacturers of parts, replaced parts, tried to connect with them and without. Most fear that those who are faced with this and found no reason. I'm desperate, money for a new computer there is a maximum to replace the item. But what?
The list of new parts/procedures before catalyzation process:
1)Replaced the i5-2450p on the i7-2500k
2)Installed a new SSD and it is windows 10 (official) + crack
3)Added two new strips of RAM (previously worked on frequency 1333, though quicker, after installing the new raised to 1600)
4)Installed a new cooler

List of completed procedures and inspections:
1) Updated, removed (completely), rolled back the driver
2) Replaced the CPU on the old one, disconnected the graphics card and tried on another, cut off all the strips of RAM and connected at one
3) Tried in a large number of games (the problem is everywhere, even at the largest little noticeable aliasing and vertical sync tried)
4) Changed the thermal paste, checked temperature (all normal)
5)Completely dumped any acceleration, threw off on a default and CPU and RAM
6) Cleaned the computer from dust

Not tried:
1) Reinstall Windows
2) Check the PSU, replace the motherboard
3) With another monitor

Config:
Windows 10 x64 with update September
Motherboard: maximus v formula. She is about 8 years.
RAM: two corsair strips with a frequency of 2133, two 1600. DDR3. Work on 1600. The first two stand for many years, the second two bought Boo a few months ago.
CPU: I7-2600k, overclocked to 4.0. In the most stressful conditions more than 75 not warmed. Idle around 45-50. Boo, purchased two months ago.
GPU: Gigabyte 1060 6gb (bought in store, a year and a half ago)
Drives: SSD, wd 500, hdd from seagate to 1TB.
PSU: 600 watts, about eight years.
Monitor: Acer 60Hz (about 8 years)

Additional infa:
Motherboard works fine, but only runs if the cooler is hard to bend in one direction. If this is not done, the computer dies a few seconds after launch, and itself starts to run again. Moreover, it should be done only at the time of launch. After the computer comes to run OS - x you can at least where to move. I suspect there's a hairline fracture.

Video demonstration of the bug: (look at stickers)


Possible causes:
1) Windows or virus
2) the Motherboard has a crack which graphics card or CPU do not work well (and this causes artifacts)
3)the problem with the monitor?

In the end, the questions:
1) What could be responsible for such nonsense?
2) Could there be a problem in the motherboard (the microcracks, for example)? Should I buy a new one?
3) does it make sense to carry in repair?
4) What else should I check and do?