Hi guys
Yesterday I was successful all day with the tip that our friend went from pressing Y to change the mode of the video card to compute.
But unfortunately this morning I went to check and returned to normal as follow prints.

First the print from yesterday that everything went fine:
https://1.bp.blogspot.com/-uYYYe8vs7Ug/W2mCjJj4axI/AAAAAAAAA30/KQ5bx-ZIcEIOJyAxj8P1akWIQY57rHeWwCLcBGAs/s1600/Dag%2B21.png

Now that the mining industry has halved:

https://1.bp.blogspot.com/-32lFYgwzF2w/W2mCk0jP4qI/AAAAAAAAA34/q-NeHaj5PKEG77SR336zQZBp-akZ2wqEgCLcBGAs/s1600/Nice.png

I see that the miner changes this DAG from # 21 (where it was well undermined) to DAG # 203, is there any way to leave # 21 fixed?

Sorry for the pictures I could not put directly here.

Oh, and I also used the program indicated by the friend above.