Quote:
South Bridge:
1. 6 x SATA 3Gb/s connectors (SATA2_0, SATA2_1, SATA2_2, SATA2_3, SATA2_4, SATA2_5) supporting up to 6 SATA 3Gb/s devices
2. Support for SATA RAID 0, RAID 1, RAID 5, and RAID 10
GIGABYTE SATA2 chip:
1. 1 x IDE connector supporting ATA-133/100/66/33 and up to 2 IDE devices
2. 2x SATA 3Gb/s connectors (GSATA2_0, GSATA2_1) supporting up to 2 SATA 3Gb/s devices
3. Support for SATA RAID 0, RAID 1 and JBOD
Looks like you got enough SATA to set up an e-sata yourself, but it doesn't list one being there.