I'm hitting a wall too.
This
https://www.3dmark.com/pr/1162218 was my best score so far.
+215 core // +1250 mem
1000w rebar bios
Hydro Copper Kit installed.
classified tool:
NVDD: 1.2183v
I tried to go for +230 core but can't get it stable even when I add 1.25v NVDD :(
Overall I'm still very happy with the card but I'm super disappointed with the Hydro Copper Kit.
Delta is about 25c when under 600w load... just not acceptable. I checked the die + mem contact and re-seated the card already. I'm using Kryonaut paste + thermal right extreme pads (2mm) front and full cover pad (arctic 1.5mm) on the back.