also the last driver i can use is 16.11.3, 16.11.4 and above they not working, i got a yellow ? on the driver
same happen with win 7 and 10

but is ok 16.11.3 is working fine, no fan bug
Its cause of custom bios I think. Use the pixel clock patch. It will sort the issue out for you and the cards will get detected.
https://www.monitortests.com/forum/Thread-AMD-ATI-Pixel-Clock-PatcherGood Luck!
ha ok but i just keep the 16.11.3
i notice something else what is strange
when i put memory to 1900 start the miner is hash around 750mh
when i increase the memory to 2000 (hash speed stay the same)
i close the miner start the miner again with 2000 i get 800mh (at 2000 it s unstable gpu crash after few minutes)
but i decrease the memory to 1900 it s till hashing at 800 (but same computer crash few minute later)
but why is that ? does the miner lock the memory speed ?