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SATA (ODD) DVD use the Intel SATA2 ports.
Example ASUS P67 MOBOs:
Intel® P67(B3) chipset :
2 x SATA 6Gb/s port(s), red
4 x SATA 3Gb/s port(s), gray <= DVD
Support Raid 0, 1, 5, 10
Intel® P67(B3) chipset :
2 x SATA 6Gb/s port(s), gray
4 x SATA 3Gb/s port(s), blue <= DVD
Support Raid 0, 1, 5, 10