mmm... no... you're mistaking something. bios has nothing to do with windows.
Bios is like the onboard control software for the motherboard... this is applied BEFORE windows even is loaded. So swapping motherboards or adding SSDs in a RAID0 settup has nothing (particularly) to do with the BIOS. when you change a motherboard the new motherboard will come with a new bios. the bios is part of the motherboard... not part of the operating system (windows). The motherboard will be able to detect any new hard drive you connect and even will be able to set up that RAID 0 set up for you; all before windows even loads. windows TALKS to the motherboard to lean what's connected in your system, and it needs "drivers" to be able to use that hardware. When you add new hardware the motherboard will detect and identify it, then windows when it loads will talk to the motherboard's bios, get the identification information from the motherboard and then apply a compatable driver to allow you to use that new hardware in windows.
the reason there might be difficulties going from one motherboard to another is because windows might not have the proper drivers for some of the hardware on the new motherboard... and might crash your system before you can fix that. that's why i said you should be alright because you have the same southbridge on both boards, so windows probably will be able to actually load up, allowing you to fix whatever hardware issues you might develop going to a new motherboard.
when you set up the RAID0 set up windows will likely be able to work with it because by that point in time you'll have loaded all the proper chipset drivers for your new motherboard.