Do you want to play Blu-Ray movies on this? I so take mciahel's advice. If the mb and your graphics card are not fully HDCP-ready from disc-to-display; it won't work (at least not at 1080 resolution). Just a heads-up, since one of my systems is in exactly that boat - no way to make Blu-Ray play, even over Sata, on this older mb with a non-HDCP compliant graphics card (Radeon 9800-XT), even though it supports HDMI via DVI.
If on the other hand you just want the capacity of BR, then it "might" work with the right drivers, but again, I've had problems driving optical BR SATA on older mb's. It can be done though, as my ancient Abit board is doing it right now (with bios tweaking, of course) but no BR movies at 1080p
Like Eric said - if you already have it - try it!