It will be somewhere in the IDE Configuration section. If all you see is "native ide" in the sata options, then you don't have achi. Some amd boards are setup like this; trim support is not listed for amd, unless microsoft has updated windows 7 for it. Native ide is about the same speed as achi.
Not me. If you want service issues, stick with gigabyte or asus. I had no serious service problems with the low end biostar, ecs, or foxconn. Just follow their form procedures for tech support or rma. Ecs and foxconn were the only manufacturer's that bothered to email me a new custom bios to fix my problems.