Plextor 1610 Recording Problem

[DW]

I have made all the changes I think have to be made in order to record at a higher speed.
I have enabled DMA
I have Made sure auto insert is off.
I have reset my bios PIO to 4 and DMA to 2
I have only the Plextor 1610 on the 2nd IDE Channel and added an 80 pin cable that is 12 inches.

At 16x I can burn a pregap and when it starts to record I get record not successful.

At 12x I can burn a pregap and1/3 through the first track and then it stops and record not successful.

At 10x I can record the CDG fully. Great Graphics, Great sound, with Very Minor degradation.

Is there anything else I can do to record at a higher speed or is this the best a Plextor 1610TA can do for CDG.