Let me see...
OK, everything looks good(except the DDR2 on a FX-51 platform) the chipset should be labeled clearly on a chip near the bottom of a board. If it's asus, i'd venture a guess at nForce or VIA, but either way, you need to notice the actual chip number, not just the chip. Also, take the Cable Select off, and actually set the drives as a master and a slave. check the cable used to connect them, it could also be faulty, and make sure your Power supply is adequate. at the very least, it should be 450 watts, but a 550 or 600 would be more appropriate with the power those drives are sure to be using. try swapping the channel that you are connected to, as well. if need be, go into your bios, and make sure that everything is properly configured. Don't change anything that may screw up your RAID array, but make sure that it is set up properly, so as not to conflict with any other HDD's.
If none of that works, we will need more information. onto which drive is XP installed? if it is installed onto the raided raptor drives, which i would assume it is, then it might be an issue with the drives themselves, but check the cabling, power supply, and jumper settings first.
Good luck!
