Thanks
@Gigamaxx
It's Working now..
But I must boot with Intel HD530 until the login screen then I plug the HDMI to rx 480. It's exhaust me. Is there any method to boot dirrctly with my VGA?
Download "Clover Configurator" google it.
Download EFI mounter use search tool on this site.
1). Open EFI mounter and select disk0s1 if you only have one Ssd or hdd connected in Sierra.
2). Open the EFI folder that appears, and then open clover folder, then drag your config.plist to desktop.
3). Right click on config.plist on desktop and select "open with" Clover configurator should appear as an option. If not open clover configurator and then close it again, then repeat the " open with" process until you get the clover configurator option.
4). When you open it go to SMBios and check to see if your system specs are there.
Then choose Boot from the menu bar. There is a bar that has "Default Boot Volume" click on the blue tab and select Last booted Volume if you have only one Ssd or hdd, or you can select the name of your Ssd or hdd.
5). Below it there's a "Timeout" tab, this sets the automatic boot start time, 0 will give you no chance to see the clover screen and make adjustments, 5 is default and is a 5 second delay so you have time to stop the process if you need to make any adjustments in clover. Leave it at 5 is the best option.
6). Save changes and close clover, then drag the desktop config.plist (edited) to you clover folder and make sure you get the "replace" prompt and that it goes back to its original location.
7). Reboot and it should autoboot on its own without you hitting enter. If all goes well and you get to log in screen then you can try it with the cable only connected to the RX card.
This is called the black screen boot method, it is not a problem as long as you have your clover configuration ready and don't need to make any last second changes before booting. You will know if it's working because the RX card will rev up the fans before you see any screen action, if you hear that you should get to log in screen.
If you want to remove password requirement you can go to "System Preferences" and select "Users and Groups" hit the unlock button on bottom of window and then select "log in options" you can select auto login and your system will boot from black screen to Sierra without needing a password.
*** if you're ok with security and not worried about anyone else accessing your computer then this works great. If you don't want anyone else to have access then don't use auto login.