I have this problem, weird thing is it happened to both my old GPU (R9 270x) and my new one(R9 280x), is this a motherboard problem? or maybe drivers?
you can upload it onto a site which facilitates this like SaberCatHost or DropBox,these i like since not so much (or any) spam comes with these.download hwinfo32,
install and open it,
check "sensors-only",
click "run",
at the bottom of the window click "logging start",
choose a name and place for the log like "hwinfolog" at the "desktop",
this log can be viewed/opened with either excel from Microsoft or libre office calc.