Originally Posted by Marmot 
By the way, I'm sure I read on the Asus site that AHCI doesn't work with ICH9, can anyone confirm that?
Cheers,
M
Back at the end of August I breathed life into a new system. The BIOS supplied with my P5Ke-WiFi caused my new Vista 64 Home Premium installation to fail if I enabled AHCI. I EZ-flashed to the 0503 version of the BIOS and found that Vista installed quite happily with both AHCI and "Robson" Technology enabled. All has been well since then. I know even later BIOSes have now been released but I'm firmly in the "If it ain't broke, don't fix it" camp on this one. Good luck with your "no re-install conversion" efforts.