DVD burner incredibly slow after processor upgrade

[Paul Smith]

Dear All

After an upgrade of the processor and motherboard of my computer, the
DVD burner became incredibly slow when burning (speed 1.4x). Can one
restore the old performance of my burner? I am running kernel-smp on a
FC5 machine with a P4 Dual Core processor. My DVD burner is a NEC
3520A.

Thanks in advance,

Paul