The more difficulty, the more has to be productivity in Mh to find the solution. If difficulty above the nominal productivity of your video cards, the longer they look for the decision. On the picture it is presented 6x584x24h from constant difficulty. Compare the schedule to the schedule on angrypool.

https://ibb.co/b89sCT

The schedule for constant difficulty for raiven. Too it is very indicative in comparison with other pools.

https://ibb.co/eyvXU8