If you'll notice the cards have slowly had their "throttle" temp increased over the generations due to better components on the PCB. I bumped it down to +130 and it is stable but I did not touch the voltage.

They only way I was able to do it was to increase the voltage to 70%.

Pretty much every card also gets the same memory overclock from anywhere to +500-800mhz.
I've found that a lot of RTX 20-series cards tend to get quite toasty, especially the 2080 and 2080 Ti models. Especially with how locked down Pascal is, tweaking the voltage will not have a noticeable impact on the longevity of the card. Power Consumption. So just boost your power to whatever maximum your card allows, add anywhere from 100-200mhz or so depending on your card to reach the before mentioned overclock range and you good to go. Remember, these are well-educated electrical engineers that specified the amount of voltage the card would receive and can receive and even went as far as placing a factory overclock system into the card called GPU Boost 3.0. In this example, the RTX 2080 FE draws 225 watts at 100%.

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