I have artifacts (like triangles) in all games. The problem appears right from the start of any game, however, nothing's wrong with the desktop and "office" applications. I have the latest version of the graphic driver - "Crimson ReLive Edition 16.12.2 Optional."
Some specifications of my PC:
Windows 7 professional x64
Video card: ROG STRIX-RX470-4G-GAMING
CPU: QuadCore Intel Core i5-2400, 3300 MHz (33 x 100) Motherboard: ASRock H67DE3/SI (with the latest BIOS)
Power Supply 600W
If some more information is required - please let me know.