This problem is occuring after installing drivers http://imgur.com/Z9CeHhd not before installing driver for r9 270x should I get it changed ?? Bought it from local dealer with 3yr warranty day before yesterday
These issues are often heat and/or power related. What make model power supply are you using? Also, how hot are the CPU and GPU at idle and under load? Are you overclocking anything (CPU, GPU, memory)? And, did you remove any previous drivers before installing the new GPU and drivers?