When I changed my GA-8PE667 Ultra 2 (845PE)mainboard to GA-8IK1100 Pro (875P) I can not enable DMA for IDE devices on Win XP. The same thing happens on ASUS P4P800(865PE). Application Accelerator does not install on my 875P or 865PE. So I can not enable DMA and whenever I burn a CD (specially On The Fly Mode) my pc becomes very slow and unusable.