below 70 degress is quite ok i would say ... arround 80 degrees i would stark thinking of changing a bit!
on the other hand ... why not increase fan speed? i guess its allready loud so why not giving them some more speed to be sure, the gpu stays alive
but i dont have any clue about fanspeeds on SMOS since im using a watercooled rig which controlls the temps and fans by an external controller - by the way nearly unhearalbe ... sounds similar to a fridge - but a new modern one - temps on 4xHD7990 are 50 52 56 54 51 49 62 57 ℃
One of the gpus which is behind every card fluctuates on gpu clock and so hash rate. It may be because of throttling or bios mod problem. Maybe I undervolted too much. I will try to increase its fan speed first. If it is ok then all is well . Otherwise mod its bios with higher mV.
I hope Claymore -tt and/or -fanmin commands work in SMOS. I did not tried it yet.
Claymore says:Note: for Linux gpu-pro drivers, miner must have root access to manage fans, otherwise only monitoring will be available.
Does SMOS have root access by default? If not can I set it, how?
Last resort would be hardcode a high minimum fan rpm for this card into its bios and flash it but then I will run always on this rpm.