I have a sd-5372 burner that has slowed down for no reason that I can tell. I have burned about 25 dvd at 16x (it takes about 6.5 min) now it burns at 8x or slower about 11.5 min. I am using nero ultra 6 and I have another dvd burner nec 2500 8x. Also I have checked my ide settings and they are both at the u ltra dma. I ran nero dvd speed and it rips at 16.6x. Hope that is enough info. Thanks for the help.