gsrcrxsi
i don't think it has anything to do with the backplate. there's not any thermal pads between the backplate and the card. just the standoffs where the backplate is screwed to the card.
Just wondering if you know for fact there is no thermal padding between the backplate. I am not saying you are wrong. I dont have a 3080.
Reason I ask is because my EVGA RTX 3070 XC3 Ultra had thermal padding between the stock backplate and PCB. Got a pic if you would like to see. Just seems strange a 3070 would have the padding and not a 3080.
I believe there is a thermal advantage to having a backplate. Especially an active backplate. Any high-end card would benefit from one. The stock backplate on my 3070 got hot enough you would burn you fingers when gaming. Same as the EK backplate on the 3070 now with the EK waterblock. And yes, there is a ****-ton of thermal padding under it as well. This is true for my RTX 2070 Super Black as well. It didnt have a backplate stock, but the EK backplate on it now gets super hot when gaming. You would burn your fingers if you held them there. The more ways to dissipate heat from those chips, the more chances of higher and smoother clocks. Some cases with poor airflow might hinder the removal, but the backplate is certainly going to pull the heat if properly installed. Even a card that didnt have a backplate from factory will benefit.
Not only that, it hides and protects a hideous and vulnerable PCB.
Cheers, just sayin'