[KJ44]

I use k3b to burn a DVD at 4x simply because 4x reduces the amount of mechanical vibration from "loud and annoying" to "barely audible". I've also put a big weight (a ferrite ring) on top of the drive to damp vibrations even more.

My 2 cents is that corrupt DVDs are more likely if the DVD burner is not secure in the PC case, as can happen with mounting rails designed for ease of insertion rather than mechanical solidity.