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?
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