I'm still fairly new with RAID, so I can't say for sure... However, I'm pretty sure you're fine as long as the chipsets are the same or very similar. I assume in the cases above the RAID capabilities were all within the chipset and not some external chip. Since each of these have been a step up from the previous, I don't see why it wouldn't work... Heh, but again, I'm still not 100% sure ^^;