I already changed the registry values (to don't need reinstall Windows)... ("HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\msahci\Start = 0" and "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStorV\Start = 0"), but the option to activate AHCI don't appears on the bios menu (v0071) of this motherboard...
Can somebody help me?
If you are on a Mechanical Drive you won't see any kind of performance boost. Even if you are using SSD you will not see any tangible performance boost.
SSD companies recommend the AHCI to be enabled to make sure that certain functions are enabled.
Just make sure that your OS doesn't have too many programs at startup, regularly defragmented "i.e. twice a month is more than enough". Always better to clean up the HD before before defragmenting it, then go for a disk check, & defragment it on IDLE.
Auslogics disk defragmenter is highly recommended