H55 doesn't do raid. P55 does.
I think you just assumed it would support it actuallty, or someone else told you it did and you didn't bother to actually check first. So I don't think it's the board that fails.shucks - Zotac H55 = fail
IDE Configuration
The items in this menu allow you to set or change the configurations for the IDE
devices installed in the system. Press <enter>to display the configuration options:
q Configure SATA as
This item allows you to set the SATA to IDE/RAID/AHCI mode.