Hello, I need some help.

I just bought a new computer that I cant get to run any 3D games.
It works fine with everything non gaming related but when I start up games like
black ops 3 , gta 5 , project cars, rust , wildstar I get in the menu and can start the game.

But when inside the game when its finished loading I might be able to play for 2-10 seconds
and the screen goes black (shows a disconnected hdmi cable icon on monitor) while the audio
keeps running in a loop for 4 minutes. Then the audio and lights on my Razer keyboard and
mouse dissapears. Meaning both the speakers and mouse/keyboard loses connection to computer

I've tried pressing alt-enter, alt-f4, ctrl-alt-delete, alt-tab but it dont help.
I have to press the power button down for 5 seconds and reboot.

The things I can play with great success however is League of Legends, Diablo3 and
Adventure Capitalist. Ive play these games for hours no problems except for one:
In League of legends I can only play on the map Summoners Rift, if I play on the higher
graphically intense map "ARAM" i sometimes get back screen.

Oddly enough 3D Mark Advance benchmark program works fine. Ive ran it about 30 times
and it works fine but I dont know if the results is good for my computer. The result is here:

PicPaste - 3d-GE2zPCsp.png

Ive tried 3 different monitors and different hdmi cables. As of drivers I have Radeon Software
Crimson Edition 15.12.

I decided to try uninstal all the amd drivers with the amd complete driver uninstall because I wanted
to try reinstall all the drivers to see if that helped. But as soon as the amd driver uninstall program
was finished my screen went haywire - like it showed only distorted noise much like in old
tvs that lost signal? Just with lots of colors.

So I had to reboot and boot up with windows 10 disk and recover the computer to a point prior
to uninstalling graphics drivers.

My computer specs is :

MS COA Win 10 Home Nordic

Seagate® Desktop SSHD 1TB

PCI-Express 3.0, "DC3", DL-DVI-I, HDMI, 3xDisplayP

Samsung 27" LED Curved S27E500C
1920x1080 VA, 4ms, 1000:1, VGA/HDMI

HyperX Fury DDR3 1600MHz 8GB Black
2x4GB 1600MHz DDR3 CL10 DIMM (Kit of 2) HyperX Fur

ASUS M5A97 R2.0, Socket-AM3+
Hovedkort, ATX, 970+SB950, DDR3, 2xG2-PCIe-x16, CF

AMD FX-8320 Black Edition, Socket-AM3+,
Prosessor, 3.5GHz, 8-Core, 16MB Cache, 125W, 32nm,

Corsair CX 600M, 600W PSU
ATX 12V V2.3, 80 Plus Bronze, Modular. 2x 6+2pin P

NZXT Phantom Special Edition Sort/Orange
Vifter: 2x 120mm Side, 1x 200mm Topp, 1x 120mm Bak