I recently purchased an Intel DP43TF motherboard (P43 northbridge/ICH10 southbridge). I will be using this motherboard with 64-bit Windows 7. For some reason I cannot get Windows 7 to install if AHCI support is enabled. If I do an EFI install of 64-bit Windows 7 the computer reboots continuously. If I try to do a traditional BIOS install of 64-bit Windows 7 with AHCI enabled I keep getting an error message from Windows stating the computer rebooted unexpectedly whenever I boot from the hard disk. I have an Intel X25-M 80GB SSD so I absolutely must have AHCI enabled so I get TRIM support. The motherboard has the latest BIOS version NBG4310H.86A.0104.2010.0122.1624 that was released on January 22, 2010.