turned on compute mode?
using 2 gpu threads ?
like this

"gpu_threads_conf" : [
   { "index" : 0, "intensity" : 1024, "worksize" : 8, "affine_to_cpu" : false },
   { "index" : 0, "intensity" : 1024, "worksize" : 8, "affine_to_cpu" : false },

1024/8 is good for rx 580, dont know whats best for 570
pagefile needs to be big enough too

btw this strap sucks, find or buy better one