Your English is fine. Thanks for posting pics of your card. I just ordered the same card to replace my sapphire that won't unlock.
Few questions about your card,
-Does your card have a dual bios?
-Are you able to change the voltages? and if so, can you under-volt it as well as over-volt...
I've got the exact same card and tried the same steps as you with no luck unlocking the shaders. Can someone more technically inclined take a look at this supposed Antilles specific bios with a hex editor and see if something else can be done to unlock this card?
I'm wondering if AMD is...