I don't think it's your fault.I have the same problem. Stumbled upon it some weeks ago, IIRC when 19x.xx drivers came out. Reinstalling didn't help. Uninstalling and then installing helped, IIRC.
BTW, too many "IIRC", so I'll give it a try, cause right now don't have GPU temps anywhere but Everest.
EDIT: Uninst/inst didn't help. Used DriverSweeper http://www.guru3d.com/category/driversweeper/ then installed 191.07 and it works great.
Sorry for all this relatively off topic chat, but this is proof that missing temps has nothing to do with RT. Maybe there is many driver leftovers on this 18x.xx to 19x.xx crossover and regarding it has some power management additions, it could be the reason for mess up.
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