Prior to formating the hard drive of an older machine I wanted to store my data on another computer. I thought running the data through a network cable would be too slow for my taste so I removed the drive from my old computer and stuck it into in my newer one. I connected the drive with my IDE cable (which already had a DVD-burner attached) and booted up. Performance was terrible. I thought that maybe it was a master/slave problem. The drives have no writings on them telling me about the jumper settings and the manuals are long gone so I simply disconnected the DVD-burner. Performance was better but as soon as I started copying the files my mouse started to lagg. I have no idea what's happening but surely this indacates something isn't right. HD Tune 2.55 reports that my transfer rate is 1.4 MB/s. It also reports its temperature being 50C/120F degrees witch is a ~10-20C/15-30F degrees higher than my other drives. Im having a hard time imagining this being the cause though. I tried updating my drivers in the My Computer->Manage->Hardware but it couldnt find any newer drivers. I have a ASUS P5B SE motherboard. The only options available in the BIOS IDE Settings menu is: Sata Configuration: Disabled/Compatible/Enhanced Configure SATA as: IDE/AHCI IDE Detect Time Out: 0/5/10/15/20/25/30/35 JMB363 RAID Controller: Enabled/Disabled JMB363 Mode Select: RAID/IDE/AHCI I downloaded the manual for the MB but strangely it didnt explain more thuroughly what any of these do. Any help would be appreciated.