Well if this data throughput is noticeable more on server side applications then one should probably review the AMD server chipsets. The SB750 is normally sold on mainboards targeted for the normal home users. Just that theres RAID 5 and other stuff that would make it suitable/interesting for servers probably doesn't mean that it is really meant for professional server building.
Though I guess a lot of people (also in business) use the cheaper mainboards for server use. I mean back at the times you'd find nearly only SCSI hdds in servers and later some hosters e.g. seemed to use normal IDE pata drives.
Stop TCPA, stupid software patents and corrupt politicians!