Had some spare time, so i took apart my gigabyte 3060ti eagle.
It is quite obvious why the temps are sub par on this card
1) no tim between memory heat spreader and heatsink
2) back plate is thick plastic and has a lip that impedes airflow.



saw this crap on my gigabyte 5700 oc as well.
After reassembling without the plastic back plate (had to use a couple of washers to attach the heatsink back on), it looks like mem oc went from +1000 to +1200.