990 is a high memory setting for 5500XTs. I suspect you are on the edge. Been there done that. Mine will run 28+ as well, but start to get invalids, dead GPU, etc. I back it down a bit, much happier:
Man, thank you for sharing that screenshot! I have duplicated your settings on my 5500XTs… running a little cooler, less power… will monitor and hopefully no more hiccups… It has run for over a month at the other settings w/o a problem so I thought I was good to go.
The RX580 is still running smooth but at 28.33 MH/s. I had hoped for more out of that card. My old 1660Ti is still the best in my lot lol!
Thanks for all the advice!
I hope all of the Hive team keeps safe over there in Ukraine, we are praying them all.