Having tested version 1.7.1 I will say with confidence
for old pitcairn cards
  benchmark shows a huge drop on heavy, normalv7, normalv8,
stellitev4 test interrupted by message
Error CL_BUILD_PROGRAM_FAILURE when calling clBuildProgram [ctx-> Program] for DeviceID 0 (Thread 0)
[2018-11-23 17:25:04] GPU's Error initing. Stopping miner process
[2018-11-23 17:25:04] Stopping miner process
transition to kernel 2 did not give results
I am completely disappointed with the miner
great job