Asus Motherboard P4S333-VM - Manual (Page 98)

5-6 Chapter 5: Software support
4. From the FTP site, select the
BIOS version that you wish to
download. Click Next.
5. Follow the instructions on the
succeeding screens to complete
the update process.
If you selected the option to update
the BIOS from a file, a window pops
up prompting you to locate the file.
Select the file, click Save, then follow
the screen instructions to complete
the update process.