ok i got a Seagate 750gig hdd from a old computer of a friends, and im trying to use it in my computer just for the extra space... but it wont show up in the bios or windows, and when its pluged up it cos my computer to boot three times as slow, it will stick at the post screen but will go by it a couple of mins later. its sata... ive allready using another sata 750 hdd and a sata dvd burner... its no big deal if its dead or not, i would just like to use it... and its sata2. i thought about maybe capping it at 150mb but will that change anything? my mobo is sata 2 so i know thats not the problem. i just cant think of anything else to try so i anyone has any ideas that would be awesome.