I have an evga 1300w gold psu, I've tried different ports on the psu and different pcie cables. The darn thing has looped ubigine valley for hours and I've played witcher 3 for 2 hours this morning with no errors, played far cry 4 with no errors last night. Then I get display driver stopped errors browsing the web and on every other wu from einstein and fah project. Doing my head in, if I return it and they loop something on it like valley then it will probably pass and be returned to me. Really lost on this, really considering ebaying it as working with intermittent fault and taking the loss.