I found this on audiomidi.com
http://www.audiomidi.com/aboutus/rev..._rme_ff800.cfm
One fact to keep in mind, using the ?faster? FireWire 800 will not give you lower latency than the original FireWire 400 spec. Rather, the increase in bandwidth will allow for higher track counts over FireWire 400. Not to fret, if your computer only has FireWire 400 you will still get all the low latency capabilities of the RME FireFace 800