You don't need to change anything else, most videos I've watched on YouTube always said to leave the back thermal pads as they are, if you want to see an extra cooling performance then buy a copper pad online with fans on them, this can drag down 2-3°C too

Strictly made for 3080s and 3090s
it's not a copper pad, it's a heatsink with fans. Don't confuse it with copper pads that dumbsters apply to memory chips.