Well to be honest, it worked fine for me using Intel Motherboard.
I will tell you what are the theoretical requirements?
- Intel Matrix RAID BIOS Version needs to be the same on both boards.
- Drives needs to be connected to the same position as it was on the original board (example drive 1 to sata port 0, drive 2 to sata port 1)
For me, i did the test on several new Intel Board 3 and 4 Series, it worked fine without any problem.
Once i connected to the other board, the raid array was recognised and it was online.
On some system, it fails to boot onto Windows due to hardware issues, i had to re-install the OS, but all the data was intact.I did not have to recreate another raid array in Ctrl + I.
Now if your data on the drives are very important, i will advise you to make a complete separate and verified backup before proceeding.
All the best,