I've got a Dell Dimension 4400 with 512ram 80gig HD 1.8gig pentium 4 processor. We ordered it with a philips DVD/CD burner 2.4x DVD and 12xCD burner. I burned a dvd on it at one point, and burnt tons of CDs. One day i couldnt burn a DVD, but could still burn cds, so i called dell, and their diagnostics didnt work, so they sent me a new one, because we still have the warrenty. The new one is a Teac 8x DVD and 32x CD burner. I installed it, and burnt a DVD and CD successfully. But its extremly SLOW. It burns at 1x instead of 8x, and the CD burner burns at 10x instead of 32x, and while its burning, it just stops for a little while, then starts back up. I tried using the latest Nero, and Roxio 5 Premuim, and i get the same thing. Any idea what it could be??