thx for the hint, the second line I found myself.
Problem is this made my trouble worse.
After adding the EULA-Line the memclock is nailed to 1250Mhz.
Up it goes but not under the stock speed.
changing the config file doesn't always unlock your vid card for msi ab, if you can't change it I suggest using AMD GPU Tool. It will let you change the clocks but it doesn't have a fan feature, so use it to set clocks and then use MSI to set fan. This was the only method that worked for me because MSI wouldn't work. Had to scoury alot of oc forums, and this combo really works if you can do it alone with MSI AB.