My idea is to use both, yes, but for now I'm trying the new one in "single-mode", aka, removing the old one before inserting the new one.
A new batch with newer features and fixes... well... it's the same hardware, so, unless it's something in the firmware/BIOS of the card, I can't think about anything else.
Anyways, this is a standard PCI card, and as it works with other motherboards, I can't really understand why it won't work with mine.