This a reply from Gigabyte
"Thank you for your kindly mail and inquiry. About the issue you mentioned, the eSATA/USB Combo port does power supply. Please first make sure that you had already change the Onboard ESATA Mode to AHCI then you may need to re-install the OS and driver again for this function.
If you still have any further question or suggestion about our products/service, please do not hesitate to contact us. We will try our best to help you resolve the problem ASAP.
Regards,
GIGABYTE TECHNOLOGY "
I did as instructed and it did not work..yes I changed bios then reinstalled the os (win 7 64bit)