No thermal throttling, its limited by bios clock speed limits.
I had to update to latest bios which should be more stable and also has higher power/clock limits.
With updated bios at stock, cooling is adequate. I have a case with poor airflow that becomes a hotbox if there is too much heat coming out.
At stock with 160w PL, i get gpu temp of mid to high 70s and memory in high 80s.
But stock uses way too much voltage. With undervolting i can get slightly faster performance at 130w and temps drop to high 60s and mid 70s resp.
For my own use case, i think even this is wasteful. I optimized it for 110w ( -30%PL) and i get 3-4% slower than stock and much better thermals/fan noise.
This is only 8% slower vs max everything + undervolting at 160w.
Max PL is 160w+20% but not useful as we cant increase clock speeds beyond 1820 which uses 160w with undervolting.
There are mod bios available too which can be used to increase PL and clock speeds ( beyond 2000 ), probably can get an additional 10% performance this way
but this gpu may not be built for that as its hot enough already at 160w.