Anyone any idea what would cause this please? 

PSU or the mainboard? thanks
PSU is this one: http://xfxforce.com/en-us/products/psu/xxx/P1-650X-CAG9.aspx
board in my sig





PSU or the mainboard? thanks
PSU is this one: http://xfxforce.com/en-us/products/psu/xxx/P1-650X-CAG9.aspx
board in my sig


