As you have seen, all drivers and bios have been removed for the discontinued/unsupported boards.
What operating system? If Windows 10, those drivers should be "inbox".
Yes the OS is widows 10 but realtek HD audio driver don't function.
Maybe I need to look for old version?
What do you mean "don't function"? Is the driver visible in the device manager without the yellow bang? Or, are you simply not gettting any audio output.
Provide more information for "don't function".
For more complete information about compiler optimizations, see our Optimization Notice.