Wiki has a good article on the subject.
Originally Posted by compunoob
What is AHCI mode? Can you elaborate also on what you said Skynet?
I was actually refering to the motherboard Salamander has. I don't think your motherboard fully supports AHCI mode at all if I remember correctly. The Nforce5 is supposed to support native command queuing
I found this on another forum, it is a reply from Nvidia to the question if the Nforce5 supports AHCI.
NCQ is supported in the nForce5 series for AMD. AHCI is not supported on the nForce5 or nForce4 series or even the nForce6 series with the exception of the chipsets with a motherboard GPU onboard (ie Geforce 7050 and Geforce 7150, etc..). The motherboards which support AHCI do not support SATA IDE mode through the nForce drivers. On these motherboards, if you wish to run the controller in SATA IDE mode, these motherboards use the Microsoft built in drivers.
NVIDIA Customer Care
In other words, no.
Set all drive options to auto.
Yes some drives still do have a jumper on them, depends on the drive.