How to flash BIOS on R9 280x vapor-x?

Mining
#1

And what better to install ?
Since my video card shows 200s/s

#2

Try with that:
Undervolting R9 280X :

http://www.overclockers.com/forums/showthread.php/742409-Easy-undervolting-guide-for-79xx-and-R9-280X-cards