Just to clarify
For temperature just get it fromsys/class/hwmon/hwmon/hwmonX/temp1_unit, the result must divide by 1000 to get the correct celcius
and we can check whether the hardware is amdgpu or not by checkingsys/class/hwmon/hwmonX/name , If it is amdgpu then it's the right one.

Above file can be access without root.

For overclocking and setup fan speed currently the user has to be root, even sudo is not working. Maybe the user need to be included in specific group first. I leave this to the linux user, since we only need to set it once. Note that when using root user the path is no longer /sys/class/hwmon but change to /sys/class/drm/cardX/device/hwmon

For memory +1 increase 20Mhz, for core clock +1 increase 12MHz. To get the highest one use -1 instead.

Maybe for now just include the temperature so the watchdog can protect the miner in case something happen.

I happened to give the Pascal Titan X a try with this,

Results at stock, ~30.8 Mh/s in ETH and 300 Mh/s in DCR

Bumped up memory to +400 and got

34 Mh/s in ETH and 331 Mh/s in DCR

Definitely not a cost effective card but thought I'd post the numbers if anyone was curious. This was done in Windows 10 with the v6.4 build btw

Miner creates DAG on every card. No transfers. If you get error it means that OpenCL cannot allocate enough buffer. Why? I don't know. Perhaps OS allocated some memory for itself. Or OpenCL drivers don't like your configuration for some reason and therefore don't allow to allocate max memory. Unfortunately I don't know drivers logic about max memory limits calculation, I only know that is not simple and that's the reason of many problems.