I found this buried on the internet about the a7n8x:
"Changes in bios revision 4x47 include:
1) Change init raid parameter to run code to fix AMI EBDA issue and remove the "imcompleted raid set" message
2) Zero Bar5 address 0x014c and 0x1cc bit0 and bit1 for 3512
3) Change BIOS display for Sync and rebuild status.
4)Change the copyright year from 2003 to 2004 and remove smart self test.
5)Change PIO data read handling and release the EPAD version of 3512 as public download and no-EPAD version as internal use."
http://www.tweakers.net/meuktracker/5633
so, there you go, it is not in the bios anymore