Nero - Multiple recorder speed fluctuations

Hello !

I have a machine with four cd writers using Nero. It is a Celeron 1.8gb with 512mb of ram. Bit slow I know but it is my spare machine.

When I burn to cd using the multiple recorder option, sometimes it flies with all of the buffer levels up fully etc. However sometimes it can take about four times as long to do the same thing.

Any ideas on what it could be ?

Graham S

Defragged the hard drive recently?