First of all I am so sorry about my poor English I hope I can explain myself to you.
-I bought my computer from America and 5 days ago it came and I setup it in my hometown Istanbul/Turkey.
-There was no problem at all, I could play without any lag or crash or screen flickering.
-Till yesterday. Then somehow I do not know this problem happened.
-This crashes and flickering happens in every single game even sometimes in desktop.
My Computer properties:
-WD Blue 1TB SATA 6 Gb/s 7200 RPM 64MB Cache 3.5 Inch Desktop Hard Drive.
-Samsung 850 EVO - 250 GB - 2.5Inch- SATA III Internal SSD
-Intel Boxed Core I5-6500 FC-LGA14C 3.20 Ghz 6 M Processor Cache 4 LGA 1151
-COUGAR QBX Mini-ITX Computer Case Standard ATX PSU Compatibilty Power Supply
-HyperX FURY 16 GB (2X8GB) 288-Pin DDR4 SDRAM DDR4 2133
-ASUS Z170I PRO GAMING LGA 1151 Intel Z170 HDMI SATA 6GB/s USB 3.1 3.0 Mini ITX Intel motherboard
-Version 16.9.2 , Crimson, Radeon (TM) RX 480 Graphics, 8192 Memory Size, GDDR4 Memory Type, 1290 MHz Core Clock
-I am using my country's cables as a power cable of computer and monitor. I bought them randomly I did not look any special properties of cables.
-My windows Up-to-date.
I hope I can get help what I looking for, even now thanks for all your help.