All the SATA ports are controlled by the Intel chipset by the looks of it:
? SATAII controller integrated in Intel? P67 (B3) chipset
- Up to 3Gb/s transfer speed.
- Supports four SATAII ports (SATA3~6) by P67 (B3) PCH
- SATA3~6 ports support RAID 0/1/5/10 mode by Intel P67 (B3) PCH
? SATAIII controller integrated in Intel? P67 (B3) chipset
- Up to 6Gb/s transfer speed.
- Supports two SATAIII ports (SATA1~2) by P67 (B3) PCH
- SATA1~2 ports support RAID 0/1 mode by Intel P67 (B3) PCH
Stick with the SATA II ports unless you have SATA III drives.