Link to ElCapitanAMD V3 Install viewtopic.php?f=24&t=4619
IF YOU HAVE OTHER REQUIREMENTS PLEASE ASK BEFORE READING ANY FURTHER
CPU with SSE4.1 Support
HDD for Sierra
Windows or Windows Virtual Machine
USB drive with 8GB
El Capitan image from here
VT-d = Off
Windows 7 installation mode = Off
Serial port (Super I/O) = Off
EFI Boot = On
Sata AHCI = On
CSM = On
USB Legacy =On
Secure Boot = Off (if it exists)
Fast Boot = Off
Set ErP = Enabled
Set XHCI Handoff to Enabled
* This are general guide lines, not all BIOS have this options or are they equal
Follow this Shaneee tutorial
Now that you've finished Shaneee Transmac tutorial, download, extract the zip file attached to the bottom of this post.
Now drag and drop the extracted files to the USB Installer and check if the files are there, like in the picture below.
There is a Bootloaders folder I've created for placing the bootloaders inside. (Its optional, but advisable)
Boot with USB Installer you've just created and in command prompt hit Enter.
El Capitan v2 already comes with 3 predefined bootflags (remember that).
-f -v npci=0x3000
Now that you booted and everything went well goto the Top bar and select Disk Utility from Utilities.
If you stop at "Still waiting for root device"hot swap the USB Installer to other port
In Disk Utility select the HDD where you're going to install Sierra and click Erase
Now change Name: macOS, Format : Mac OS Extended (Journaled), Scheme: GUID Partition Map
Update: I used Name: macOS for exemplification purposes, but you can choose your own name for the HDD. (DON'T USE SPACED NAMES, e.g. Mac OS) If you change your HDD name, don't forget to replace it when your issuing commands
If everything went fine you can now close Disk Utility and continue the installation
After installing El Capitan, you're going to boot again trough USB Installer to do the PostInstall.
Boot and open Terminal (in the upper right corner change the flag to match your keyboard if you wish)
Now issue the command:
sh /Volumes/"OS X Base System"/PostInstall/post.sh
This said, you can restart.
Boot again trough USB Installer cause you're HDD is not yet bootable, in the command prompt choose your HDD (macOS) and hit Enter.
If you managed to create your account and entered the Desktop without the -x flag (safe mode), google, download and run Kext Utility, cause it solves the suddenly restarts and crashes.
NEVER try to install a bootloader in Safe Mode ( -x )
The only thing missing is to install a bootloader for you to be able to boot through your HDD at last.
For that, goto the PostInstall folder inside your USB Installer and choose ENOCH or CLOVER.
ENCOCH Tutorial http://forum.amd-osx.com/viewtopic.php?f=24&t=1729
CLOVER Tutorial http://forum.amd-osx.com/viewtopic.php?f=24&t=1613
For the owners of a Nvidia's cards you probably want to install NvidiaWeb drivers to get graphic acceleration.
Just follow this Tutorial: http://forum.amd-osx.com/viewtopic.php?f=24&t=1895
For the owners of Radeon's cards you don't need to install nothing the drivers already come with Sierra. You want to take a look here to see if your card works Out Of the Box (OOB):
If this doesn't work for you, just post for support and someone will try to help you. This way I can fine tune this Tutorial.
NVIDIA GTX 980
AMD FX 8350