An update on this motherboard, which I retired from HTPC use to Server use. I just added an IBM MegaRAID M1015 controller. First I was concerned it might not be compatible due to the nvidia chipset usage. Well, it worked fine.
Then there is the whole process of flashing these cards with an LSI firmware. Again, this too worked fine. I just disabled the onboard SATA, IDE, and LAN in the BIOS prior to flashing. Up until I received the card I could never find info that it would work on this board.