It is very CPU intensive. On a quad core processor it will run at 100% until done. I do mine on a dual core processor and it takes about the same time as the lenght of the movie (roughtly). The quality setting I use averages about 1.5gb per movie. I use Windows and the first thing I do is use DVD Decrypter to decrypt and copy the DVD to my hard disk. This takes about 15-20 min. I do this so that if I need to encode it again I can without using the original DVD. I usually wait until I have a few DVD's to convert. I then queue up the movies and let Handbrake encode them over night (and longer). I then use MetaX to Encode them (usually about 5 min per movie).