I have an external LiteOn SOHW-1213S (max write speed 12x) which generally works OK. I use various DVD +/-R media including Budget, Imation, Bulqpak and Logik. All these are to cover speeds up to 8x. I recently bought some Infiniti 16x and I use all the media on PC and my Panasonic DVD recorder for the TV. I have only just noticed that the maximum speed showing for burning in Nero for the Infiniti is 4x, the other media show correctly at 8x. I have tested using Nero CD Speed and Lite-On Smartburn and each of these programs shows that the maximum writing speed of the Infiniti at 4x. Can anyone explain this discrepancy - could the reason be that the Infiniti at 16x are quicker than my burner at 12x or have I been sold some "doubtful" DVD disks?