I usually burn using 2x DVD-R discs - they always worked fine at 2x. I just bought a load of Ritek 4x discs - trouble is, although Nero says ‘starting burning at 4x’, the Actual speed never goes above 1.9x throughout.
I am using the latest firmware on a DRU-500, DMA mode is set correct, I have ASPI installed, and am using the latest version of Nero.
Does anyone have any ideas what could be going wrong? I should have saved money and bought the cheaper 2x discs!