AJ Taljaard

Good day My screen goes black after a few seconds. 10-20sec. Directly after windows loads. Pc Gigabyte Z97 i7 4790k @3.7GHz Gigabyte windforce 4GB 16GB DDR3 M.2 120GB 6TB HD 7200 RPM for storage 650w PSU gold plated I have changed cables, dvi/hdmi, and power. Used a different screen and the exact same happened. Is it my GPU thats the problem? I dont have a spare or friend close by to test GPU. Thank you all