Quote Originally Posted by sesdave View Post
Upgrade to 0404/0504 were mainly in the hope of fixing the ICH9R/SATAII problem with AHCI/RAID. I didnt have the problem and upgraded in the hope of a higher overclock. Didnt see much difference between the BIOS's apart from some additional voltages/strap settings. I am sure others may offer a different view but I would stay on 0204 until you get to the bottom of this problem. What hard drives are u running IDE or sata or both. ? whats your full spec. Have u run any of the compnents on another MB before building this one?
They also added new CPU support.
http://support.asus.com/cpusupport/c...remium/WiFi-AP

Mainly, all 45nm CPUs (dual / quad) and Pentium/Celeron Dual core CPUs (E2200, E1xxx) and the G0 E4700 CPU

The strap 400 was also added with some memory dividers (but hey, hard to get it to work)