I just got my first dvdrw drive, a 4163b. Using Nero it seems to only burn at around 5x, even though Nero detects the media as 12x compatible and allows me to select 8x or 12x. This is quite annoying as I was expecting 12x out of the disks.
I did the Nero registry mod to show the exact burn speed and it only varies between 4.8x and 5.2x during each burn so it doesn't seem to be a specific problem with one area of the disk. I've done about 5 burns now, all with the same results.
The media is Datawrite branded 8x rated dvd+r, MID MCC003, and it looks genuine as the serial numbers printed on the disks all start with PAH. As it seems to be genuine MCC003 I would have thought that it should be burning at around 12x, similar to what others have posted here and various reviews have found. I haven't looked into the quality of the burns but they seem fine from a CD speed test in Nero - a smooth read curve up to 10x.
Can anyone tell me what's going on? Is there some setting I'm missing, or something else I'm doing wrong? Is it Nero, the drive, the media or me???