I have 2 Gamerock cards, one does 104MHs stable other can do only 100MHs stable.
I have fans set to 55% and power limited to 200W. Less power means less heat.
How many days you mining with this cards?
I've been mining with Gamerocks for 2 weeks now, trouble free, more stable than evga. I am thinking of putting heatsinks from Bitmains old ASIC miners to the back plate, to cool the memory for longevity.
Red Panda miner has a youtube vid on changing memory thermal pads on a brand new Gigabyte 3080 and that resolved the problem he had with the card throttling.