We just stood up 4 Avalon 741s on slushpool.  Mining around 30 TH/s, but we're seeing a lot of variation in our hashrate (especially during the day). It will be great for awhile and then start to go all over the place.  We have 2 workers setup each with 2 Avalon 741s.  Everything seems to be ok on our end.  Temperatures are in the good range, internet seems to be stable.  I've tried tweaking the minimum difficulty up from the default 128, but that just seemed to make things worse.

Anyone have any ideas where we should focus our troubleshooting?