Why would you purchase a new bios chip? These days, bios updates come specifically from the board manufacturer. You can download everything you need from the ASUS web site. Latest bios, and multiple methods and tools for installation. BTW: I also have that same MB, I also have updated the bios for it using ASUS's tools and I love it. My suggestion is that you return the bios chip you purchased from the vendor and download/install everything from ASUS.
PS: Did you receive the manual with your MB purchase? If not, you can download that as well. If you don't have it I would recommend getting and reading it. It will explain how to reflash your bios.