Let me preface this by saying that I have never setup a RAID array myself, other than by using software RAID 0 in Windows for a set of storage drives.
I purchased a new ASUS Maximus VII Hero motherboard, two SSDs, and 3 HDDs. I planned on running the two SSDs in RAID 0 and the 3 HDDs in RAID 5, as the board has two controllers: One with 6 ports (on the intel chipset) and one with 2 ports, on an ASMedia chipset. The intel chipset supports all the standard RAID modes, but I later found out (or at least it seems to be the case) that the ASMedia one doesn't support RAID. Short of buying a PCI-E SATA card that supports RAID 0, can I set up these two arrays on the 6 port supported by the intel chipset, and boot off the SSDs?