Originally Posted by Jamxx
I don't think that's correct. If you have a ATA133 hard drive, and the motherboard only supports ATA100, then you should be able to use it, it just won't operate at its fastest speeds.
I tried to use an ATA133 drive in a computer that only supported ATA66 once, didn't work. So I tried it in another computer that only supported ATA100, didn't work.
So finally I tried it in my dad's computer which DID support ATA133, picked it up like a charm. Sadly, I only had the drive for the older computer which couldn't even use it.. so it got returned.