A few weeks ago I bought a 3500 from Newegg. My computer recognized it only in PIO mode, but I was having other problems and Dell thought that there might be a problem with my secondary IDE channel, so today it replaced the motherboard (fortunately I was still under warranty). Again, the drive shows up as PIO - though my regular DVD drive is UDMA 2. I am still able to get a refund from Newegg, but before I go through the trouble of returning it (and maybe running the risk of ordering another one) does anyone have any ideas of what might be causing this? I have a Dell Dimension 8250, and have tried every possible master/slave/cselect configuration. Thanks.