I am using a Pioneer DVR-105 4X dvd-rw and various kind of 4X dvd-r. I have set the IDE in Device Manager to use DMA if available. I have tried Nero, Alcohol, and DVD Decrypter and set the write speed to 4X. Everytime it writes at 1.2X and takes 45 - 50 mins to write a DVD ISO. Can anybody help? thanks.