Matshita UJDA745 16x 8 mins burns!

the Matshita UJDA745 drive which came with my Sony Z1 laptop takes over 7 mins to burn a compilation of around 700 minutes. the drive is 16x burn and i am using taiyo yudens. why is it so slow? the Buffer is normal with no underruns and i have P-m 1.6 and 512 ddr 60gb hd

btw i am using latest nero 6303

Is DMA enabled?

yes

Over 7mins? That sounds correct to me.

Very many laptop writers start writing at 12x and then midway on the disc shifts to 16x. This gives a recording time of around 7-8 minutes.