I have my fans at about 34% and my 2080ti (240mm aio) is about 52° when gaming, but it's pretty closed off (the system is tight with wires and bottom 120mm radiator). my fans are Corsair's premium sf120mm on the GPU and a scythe kaze flex slim 120 for my CPU's 120mm aio under the PSU. Also glass sides.
My bottom panel is modded for much increased airflow
My bottom panel is modded for much increased airflow