picked up a 4163B a few days ago. up until yesterday i had been burning Ritek 4X (took me about 15 minutes per disk which I assume is normal). yesterday i bought a spindle of FujiFilm 8X DVD+R (T02-YUDEN000). Nero tells me that they are burning at 12X yet it is taking me..... 22 minutes to burn the disk!!! (despite nero saying it should take 8 minutes). I've tried shutting down all my background programs but it makes no difference. Any clues on what, if anything, I am doing wrong causing my 8X to take so much longer than my 4X?