Hi, is it normal that GPU mining has a higher error rates than CPU. I've noticed that my CPU successful block submission rate is about 100% and GPU is about 80%. This result seems to be consistent with different pools and currency.
I'm on a 2013 trash can mac pro with 12-cores 2.7 GHZ CPU. The GPUs I have are dual D700 and a Sapphire Pulse RX 580 in an Akitio node enclosure.