Whether the double-sided tape actually a thermal tape is dissipates the heat and not before this prevents unfortunately I can not say.
Hope that overclockers have measured namely tidy. But I am afraid that they have measured incorrectly.
If the components have built-in sensors that measure the temperature OK otherwise you have to with a laser knife laterally on the thin edge of the components before and measure dannach and not from above 90 ° as some.
If the metal part and the chip it is measured at a 90 ° clear the metal always cool because it indeed so or so before heat derived but as it is so topsy from the side and measure towards the only chip in both cases !!!