I am sorry to disappoint but the problem is fixed at only 10%.  I have about 10 cores from 58** serie and only 1 and sometimes 2 cores dont make problems.   And the problem is not in the cards or in the rigs. Everything is on stock settings and otherwise working just fine.  But with v9 and v9.1 (i cant remember what happens with v8) it still gives a lot of server responce errors.  The funny part is that they are all pool dependent. Least errors I get with cryptoescrow at 5000 diff.    I use 14.6 diff RCs.   Should I update the driver to 14.9?  Which drivers did u test with?

P.S. With all my other AMD cards I have absolutely no problems and I am very happy with the hash increase. 3 of the rings are mixed 5850 cards with R9 serie cards.  R9 cards work super.  But when it comes to accepting the share from the 5850 card -  the usual server responce error appears and it says the this share is with too low difficulty...