cn-gpu is core heavy. maybe you were mining coins that weren't core heavy before?
Check the fan control on this particular one, check positioning of this card.
I'm mining on MoneroOcean, so I was mining whatever they had before there. Never had an issue. HBM temperature never goes above 75°C (normal-v8). You can
check this image to see the current temperatures (and maximums). The maximum fan speed is usually when the miner restarts due to algorithm change. I don't know why the fans for all cards go crazy when it does the Vega resetting, but they do.
cn-gpu is different and doesn't care about the memory speed. in fact you can drop your hbm to 800 Mhz and still get the same speed. When i say temp it's basically core temp.
