That is a good question - I do not know, but lets try out switching off what has changed . It could be that the card has trouble with the double buffering. Try what happens when you switch that off. Also would like to know what happens with --optim STD its then still slower.
Hi Lolliedieb, thanks for reply
Here they are :
-disable double buffer and optim OFF
-disable double buffer and optim STD
-default v0.34 setting
Look like v0.31 still better hash rate to me, but I am concern about bugs fix or new feature like "New internal stratum behavior" which applied to newer version.
*btw, sorry to ask this noobs thing :
how to show images directly to this post?
Thank you