Win 7 x64 Home Premium w/Gigabyte GA-EP45-UD3P, v.1.1 (P45), works great in IDE mode. (N.B.: eSATA port is just regular SATA port w/cable as provided by Gigabyte.) Trying to install external eSATA HDD. First I enabled AHCI drivers via registry. Then I turned on AHCI in BIOS. When I save BIOS and reboot, boot hangs when DVD writer performs sniffer boot, i.e., HDDs aren't found.