4x dvd spped?

i have a nec 4x dvd+r/w and i seem to only be able to write at about 2.4 everytime. When i am ripping it will rip at about 2.4-3.5 but can i be the dvd+r media that i am uising?

Rob

You must use 4x certified media for 4x burning else you will only be able to burn in the standard 2.4x speed.