Can't install Windows 7 on SSD with AHCI enabled

[Ice009]

Hey guys, Need some assistance here please.

I just got a Kingston SNV425-S2 SSD which is my first SSD.

I went to enable AHCI in the BIOS and then when I went to install Windows 7 it wouldn't let me. I got to the screen where it lets you choose which HDD to install Windows on and every time I select the SSD it won't let me. I can install it on a regular HDD, but for some reason it won't let me install on the SSD. Windows 7 install says this on the where do you want to install Windows screen "Windows cannot be installed onto this Disk. This computer's hardware may not support booting to this disk. Ensure that the disk's controller is enabled in the Computer's BIOS menu" How exactly do I enable AHCI so I can install Windows 7? When I enabled it, it seemed to enable it for all hard drives. I have three other regular 7200rpm HDDs in the system.

MB is a DFI T3EH8 with 11/05 BIOS.

For now I changed the SSD back to IDE mode and installed it like that. What am I losing installing it with IDE mode compared to AHCI?