GPU temperature problems

I used the GPU-Z look at how the top two GPU temperature? Above a below a 66 is the first No.2 is 48 Zhelia GPU temperature is it? Temperature even higher than the number of them???? Help you

66 degrees, then 48 was a little high-OK is a core temperature it is a graphics chip to wear, and the other estimated Is a fan of the probe to pass through.Temperature over 70 degrees should be hot, but generally the core temperature to 80 degrees can at the around.Hardware used to test the time, GPU temperature high will go to 70 degrees by the end of If it is at room temperature.
If the temperature exceeds 70 degrees, in general will automatically power.Plus an external fan like a