1. AHCI speeds up the transfer times from the SSD. Set it after the installation is complete - in both the BIOS and Windows 7.
http://www.sevenforums.com/tutorials/61869-ahci-enable-windows-7-vista.html
Well, poking around I've learned that Dell "crippled" the Inspiron 620 by installing a BIOS that doesn't support AHCI, although the H61 Intel chipset on board DOES support AHCI. Hmmm..
I also found a spot
Dell Insprion 620/Vostro 260 AHCI request where someone has created a patched BIOS update file that will allow AHCI to be enabled on this machine.
So, a couple of questions:
1. How important is AHCI to SSD performance? Is it just for those who want to tweak their systems for maximum performance, or does it make a substantial difference?
2. I presume that once I enable AHCI (in both Windows and in the BIOS) I will no longer be able to boot off the existing hard drive with a Windows 7 install that was created while in IDE mode. Do I understand that correctly?