I have been working with AMD since the K2 days. I started using RAID 5 starting with Series 7, 8, and 9. All showed the same no matter what board I would use with Windows. Port 4 would always disconnect and send my array into critical. 990fx is no better and makes me want to rethink using AMD. I can run the same boards with Linux or BSD and I don't have the issues. Please fix your drivers!