was running at 18.3MH/s on 1.22 but 1.23 only gave me 8.5mh/s. Auto settings doesn't work for this card. I had to add --4g-alloc-size 4078 parameter to get it back to 18+MH/s
Where did you see 1.23, I only see 1.22 here and on github page
goto the github
Click releaes and see there is 1.23 and 1.24 for linux only.
They are on official github and fix some specific issues with older cards.
Says 1.25 will be out in a little bit and big things coming.
1.24 qas released 3 hrs ago. Evidently lol is spending the time writing code and nhasnt yet updated from pages. But if the right site and dev.

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