Windows 10 - Im getting consistently 70c temperatures(too high) with RX580s - any ideas?

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100

mkxminer.exe --exitsick --asm -o stratum+tcp://race.suprnova.cc:5650 -u  -p  -I 23 --auto-gpu
pause