Which G41 motherboard has the `AHCI mode?

Solution
G41 Chipset motherboards usually use ICH7 (I/O Controller Hub). The ICH7 (Base) chip do not support AHCI.

ICH9, ICH8, ICH7 and ICH6-based chipsets, as well as ICH5 and ICH5R-based chipsets, do not use AHCI.

(ICH9) Base officially has neither AHCI or RAID support, but with a simple BIOS mod can add support for AHCI.

(ICH9R) RAID with AHCI and RAID Support
G41 Chipset motherboards usually use ICH7 (I/O Controller Hub). The ICH7 (Base) chip do not support AHCI.

ICH9, ICH8, ICH7 and ICH6-based chipsets, as well as ICH5 and ICH5R-based chipsets, do not use AHCI.

(ICH9) Base officially has neither AHCI or RAID support, but with a simple BIOS mod can add support for AHCI.

(ICH9R) RAID with AHCI and RAID Support
 
Solution